ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 1 of 14
Member of the Family
Applications
Low voltage, high density systems with
Intermediate Bus Architectures (IBA)
Point-of-load regulators for high performance DSP,
FPGA, ASIC, and microprocessor applications
Industrial computing, servers, and storage
Broadband, networking, optical, and wireless
communications systems
Active memory bus terminators
Benefits
Integrates digital power conversion with intelligent
power management
Eliminates the need for external power
management components and communication bus
Completely programmable via pin strapping and
one external resistor
One part that covers all applications
Reduces board space, system cost and
complexity, and time to market
Features
RoHS lead free and lead-solder-exempt products are
available
Wide input voltage range: 8V–14V
High continuous output current: 60A
Wide programmable output voltage range: 0.5V–
2.75V
Active digital current share
Output voltage margining
Overcurrent and overtemperature protections
Overvoltage and undervoltage protections, and Power
Good signal tracking the output voltage setpoint
Tracking during turn-on and turn-off with guaranteed
slew rates
Sequenced and cascaded modes of operation
Single-wire line for frequency synchronization
between multiple POLs
Programmable feedback loop compensation
Differential output voltage sense
Enable control
Flexible fault management and propagation
Start-up into the load pre-biased up to 100%
Current sink capability
Real time current measurements, monitoring, and
reporting
Industry standard size through-hole single-in-line
package: 2.4”x0.55”
Low height of 1.1”
Wide operating temperature range: 0 to 70ºC
UL60950 recognized, CSA C22.2 No. 60950-00
certified, and TUV EN60950-1:2001 certified
Description
Power-One’s point-of-load converters are recommended for use with regulated bus converters in an Intermediate
Bus Architecture (IBA). The ZY2160 is an intelligent, fully programmable step-down point-of-load DC-DC module
integrating digital power conversion and power management. The ZY2160 completely eliminates the need for
external components for sequencing, tracking, protection, monitoring, and reporting. Performance parameters of
the ZY2160 are programmable by pin strapping and an external resistor and can be changed by the user at any
time during product development and service without a need for a communication bus.
Reference Documents
No-BusTM POL Converters. Application Note
Z-One® POL Converters. Eutectic Solder Process Application Note
Z-One® POL Converters. Lead-Free Process Application Note
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 2 of 14
1. Ordering Information
ZY 21 60 y – zz
Product
family:
Z-One
Module
Series:
No-Bus
POL
Converter
Output
Current:
60A
RoHS compliance:
No suffix - RoHS compliant with Pb solder
exemption1
G - RoHS compliant for all six substances
Dash Packaging Option
2
:
R1 – 30 pcs Tray
Q1 – 1 pc sample for
evaluation only
______________________________________
1 The solder exemption refers to all the restricted materials except lead in solder. These materials are Cadmium (Cd), Hexavalent chromium
(Cr6+), Mercury (Hg), Polybrominated biphenyls (PBB), Polybrominated diphenylethers (PBDE), and Lead (Pb) used anywhere except in
solder.
2 Packaging option is used only for ordering and not included in the part number printed on the POL converter label.
Example: ZY2160G-R3: A 30-piece tray of RoHS compliant POL converters. Each POL converter is labeled
ZY2160G.
2. Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-
term reliability, and cause permanent damage to the POL converter.
Parameter Conditions/Description Min Max Units
Operating Temperature Controller Case Temperature -40 100 C
Input Voltage 250ms Transient 15 VDC
3. Environmental and Mechanical Specifications
Parameter Conditions/Description Min Nom Max Units
Ambient Temperature Range 0 70 C
Storage Temperature (Ts) -55 125 C
Weight 33 grams
Operating Vibration
(sinusoidal)
Frequency Range
Magnitude
Sweep Rate
Repetitions in each axis (Min-Max-Min Sweep)
5
0.5
1
2
500
Hz
G
oct/min
sweeps
Non-Operating Shock
(half sine)
Acceleration
Duration
Number of shocks in each axis
50
11
10
G
ms
MTBF Calculated Per Telcordia Technologies SR-332 18.5 MHrs
Peak Reflow Temperature ZY2160 220 C
Peak Reflow Temperature ZY2160G 245 260 C
Lead Plating ZY2160 and ZY2160G 100% Matte Tin
Moisture Sensitivity Level JEDEC J-STD-020C 3
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 3 of 14
4. Electrical Specifications
Specifications apply at the input voltage from 8V to 14V, output load from 0 to 60A, ambient temperature from 0°C
to 70°C, output capacitance consisting of 110F ceramic and 220F tantalum, and the CCA=1 unless otherwise
noted.
4.1 Input Specifications
Parameter Conditions/Description Min Nom Max Units
Input voltage (VIN) 8 14 VDC
Undervoltage Lockout Threshold Ramping Up
Ramping Down 6.9
5.7 VDC
VDC
Input Current VIN=12V, POL is OFF 29 mADC
Maximum Input Current VIN=8V, VOUT=2.1V 17.5 ADC
4.2 Output Specifications
Parameter Conditions/Description Min Nom Max Units
Output Current (IOUT) VIN MIN to VIN MAX -401 60 ADC
Output Voltage Range (VOUT)
Programmable2 with a resistor between
TRIM and MARGIN pins
Default (no resistor)
0.5
0.5
2.75
VDC
VDC
Output Voltage Setpoint
Accuracy3
VIN=12V, IOUT=0.5*IOUT MAX, room
temperature
±1.5% or 20mV whichever is
greater %VOUT
Line Regulation3 VIN MIN to VIN MAX ±0.5 %VOUT
Load Regulation3 0 to IOUT MAX ±0.5 %VOUT
Dynamic Regulation
Peak Deviation
Settling Time
50% - 75% - 50% load step
Slew rate 1A/s, COUT=660F
to 10% of peak deviation
330
100
mV
s
Output Voltage Peak-to-Peak
Ripple and Noise
BW=20MHz
Full Load
VIN=12V, VOUT=0.75V
VIN=12V, VOUT=1.0V
VIN=12V, VOUT=1.8V
VIN=12V, VOUT=2.5V
15
20
25
30
mV
mV
mV
mV
Efficiency
FSW=500kHz
Full Load
Room temperature
VIN=12V, VOUT=0.5V
VIN=12V, VOUT=0.75V
VIN=12V, VOUT=1.0V
VIN=12V, VOUT=1.2V
VIN=12V, VOUT=1.5V
VIN=12V, VOUT=1.8V
VIN=12V, VOUT=2.5V
78.8
82.3
85.5
87.4
89.3
90.6
92.5
%
%
%
%
%
%
%
Temperature Coefficient VIN=12V, IOUT=0.5*IOUT MAX 50 ppm/°C
Switching Frequency 3 phases combined 450 500 550 kHz
1 At the negative output current (bus terminator mode) efficiency of the ZY2160 degrades resulting in increased internal power dissipation.
Maximum allowable negative current is limited to 40A.
2 ZY2160 is a step-down converter, thus the output voltage is always lower than the input voltage as show in Error! Reference source not
found..
3 Digital PWM has an inherent quantization uncertainty of ±6.25mV that is not included in the specified static regulation parameters.
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 4 of 14
4.3 Protection Specifications
Parameter Conditions/Description Min Nom Max Units
Output Overcurrent Protection
Type Non-Latching, 130ms period
Threshold 140 %IOUT
Threshold Accuracy -25 25 %IOCP.SET
Output Overvoltage Protection
Type Latching
Threshold Follows the output voltage setpoint 1301 %VO.SET
Threshold Accuracy Measured at VO.SET=2.5V -2 2 %VOVP.SET
Delay From instant when threshold is exceeded until
the turn-off command is generated 6 μs
Output Undervoltage Protection
Type Non-Latching, 130ms period
Threshold Follows the output voltage setpoint 75 %VO.SET
Threshold Accuracy Measured at VO.SET=2.5V -2 2 %VUVP.SET
Delay From instant when threshold is exceeded until
the turn-off command is generated 6 μs
Overtemperature Prot ection
Type Non-Latching, 130ms period
Turn Off Threshold Temperature is increasing 120 C
Turn On Threshold Temperature is decreasing after module was
shut down by OTP 110 C
Threshold Accuracy -5 5 C
Delay From instant when threshold is exceeded until
the turn-off command is generated 6 μs
Power Good Signal (PGOOD pin)
Logic
VOUT is inside the PG window and stable
VOUT is outside of the PG window or ramping
up/down
High
Low
N/A
Lower Threshold Follows the output voltage setpoint 90 %VO.SET
Upper Threshold Follows the output voltage setpoint 110 %VO.SET
Delay From instant when threshold is exceeded until
status of PG pin changes 6 μs
Threshold Accuracy Measured at VO.SET=2.5V -2 2 %VO.SET
___________________
1 Minimum OVP threshold is 1.0V
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 5 of 14
4.4 Feature Specifications
Parameter Conditions/Description Min Nom Max Units
Current Share (CS pin)
Type Active, Single Line
Current Share Accuracy IOUT MIN≥20%*IOUT NOM ±20 %IOUT
Tracking
Rising Slew Rate Proportional to SYNC frequency 0.1 V/ms
Falling Slew Rate Proportional to SYNC frequency -0.5 V/ms
Enable (EN pin)
EN Pin Polarity Positive (enables the output when EN pin is
open or pulled high)
EN High Threshold 2.3 VDC
EN Low Threshold 1.0 VDC
Open Circuit Voltage 3.3 VDC
Turn-On Delay From EN pin changing state to VOUT
starting to ramp up 0 ms
Turn-Off Delay From EN pin changing state to VOUT
reaching 0V 11 ms
Feedback Loop Compensation (CCA pin)
CCA pin is open Recommended COUT/ESR range,
combination of ceramic + tantalum
50/5 +
220/40
100/5 +
470/40
400/5 +
2000/20
µF/mΩ
µF/mΩ
CCA pin is connected to GND Recommended COUT/ESR range, ceramic 100/5 220/5 400/5 µF/mΩ
Output Current Monitoring (CS pin)
Output Current Monitoring
Accuracy
30%*IOUT NOM < IOUT < IOUT NOM
VIN=12V -20 +20 %IOUT
Conversion Ratio Duty Cycle of the negative pulse
corresponding to 100% of nominal current 74 %
Remote Voltage Sense (-VS and + V S p in s)
Type Differential
Voltage Drop Compensation Between +VS and VOUT 300 mV
Voltage Drop Compensation Between -VS and PGND 100 mV
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 6 of 14
4.5 Signal Specifications
Parameter Conditions/Description Min Nom Max Units
VDD Internal supply voltage 3.15 3.3 3.45 V
SYNC Line
ViL_s LOW level input voltage -0.5 0.3 x VDD V
ViH_s HIGH level input voltage 0.75 x
VDD VDD + 0.5 V
Vhyst_s Hysteresis of input Schmitt trigger 0.25 x
VDD 0.45 x
VDD V
IoL_s LOW level sink current V(SYNC)=0.5V 14 60 mA
Ipu_s Pull-up current source V(SYNC)=0V 300 1000 μA
Tr_s Maximum allowed rise time 10/90%VDD 300 ns
Cnode_s Added node capacitance 5 10 pF
Freq_s Clock frequency of external SYNC line 475 525 kHz
Tsynq Sync pulse duration 22 28 % of clock
cycle
T0 Data=0 pulse duration 72 78 % of clock
cycle
Inputs: CCA, EN, IM
Iup_x Pull-up current source V(X)=0 25 110 μA
ViL_x LOW level input voltage -0.5 0.3 x VDD V
ViH_x HIGH level input voltage 0.7 x VDD VDD+0.5 V
Vhyst_x Hysteresis of input Schmitt trigger 0.1 x VDD 0.3 x VDD V
RdnL_x External pull down resistance
pin forced low 10 kΩ
Power Good and OK Inputs/Outputs
Iup_PG Pull-up current source V(PG)=0 25 110 μA
Iup_OK Pull-up current source V(OK)=0 175 725 μA
ViL_x LOW level input voltage -0.5 0.3 x VDD V
ViH_x HIGH level input voltage 0.7 x VDD VDD+0.5 V
Vhyst_x Hysteresis of input Schmitt trigger 0.1 x VDD 0.3 x VDD V
IoL_x LOW level sink current at 0.5V 4 20 mA
Current Share/Sen se Bus
Iup_CS Pull-up current source at V(CS)=0V 0.84 3.10 mA
ViL_CS LOW level input voltage -0.5 0.3 x VDD V
ViH_CS HIGH level input voltage 0.75 x
VDD VDD+0.5 V
Vhyst_CS Hysteresis of input Schmitt trigger 0.25 x
VDD 0.45 x
VDD V
IoL_CS LOW level sink current V(CS)=0.5V 14 60 mA
Tr_CS Maximum allowed rise time 10/90% VDD 100 ns
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 7 of 14
5. Typical Performance Characteristics
Figure 1. Output Voltage as a Function of Input Voltage
5.1 Efficiency Curves
75
80
85
90
95
0 102030405060
Output Current, A
Efficiency, %
Vo=0.75V Vo=1.0V Vo=1.2V
Vo=1.8V Vo=2.5V
Figure 2. Efficiency vs. Load. Vin=9.6V
75
80
85
90
95
0 102030405060
Output Current, A
Efficiency, %
Vo=0.75V Vo=1.0V Vo=1.2V
Vo=1.8V Vo=2.5V
Figure 3. Efficiency vs. Load. Vin=12V
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 8 of 14
75
80
85
90
95
0.5 1 1.5 2 2.5
Output Voltage, V
Efficiency, %
Vin=9.6V Vin=12V
Figure 4. Efficiency vs. Output Voltage, Iout=60A
75
80
85
90
95
8 9 10 11 12 13 14
Input Voltage, V
Efficiency, %
Vo=0.5V Vo=1.8V Vo=2.5V
Figure 5. Efficiency vs. Input Voltage. Iout=60A
5.2 Turn-On Characteristics
Figure 6. Tracking Turn-On.
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
5.3 Turn-Off Characteristics
Figure 7. Tracking Turn-Off
Vin=12V, Ch1 – V1, Ch2 – V2, Ch3 – V3
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 9 of 14
5.4 Transient Response
The pictures below show the deviation of the output
voltage in response to the 50%-75%-50% step load
at 1.0A/μs. In all tests the POL converter had a total
of 660μF ceramic and tantalum capacitors connected
across the output pins. The speed of the transient
response was varied by selecting different CCA
settings.
Figure 8. Vin=12V, Vout=2.5V. CCA=1
Figure 9. Vin=12V, Vout=2.5V. CCA=0
5.5 Thermal Derating Curve
20
30
40
50
60
25 35 45 55 65 75
Ambient Temperature, C
Load Cur rent, A
0 LFM
100 LFM (0.5 m/s)
200 LFM (1 m/s)
300 LFM (1.5 m/s)
400 LFM (2 m/s)
500 LFM (2.5 m/s)
Figure 10. Thermal Derating Curves. Vin=12V, Vout=2.5V
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 10 of 14
6. Typical Application
22uF
TRIM
MARGIN
IM
CCA
EN
CS SYNC OK
PGOOD
22uF 4.7uF
POL4 22uF
TRIM
MARGIN
IM
CCA
EN
CS SYNC OK
PGOOD
22uF 4.7uF
POL3 22uF
TRIM
MARGIN
IM
CCA
EN
CS SYNC OK
PGOOD
22uF 4.7uF
POL2 22uF
220uF
VIN
+VS
VOUT
GND
TRIM
MARGIN
IM
CCA
EN
CS SYNC OK
PGOOD
22uF 4.7uF
47uF
IBV
Vo1
Vo2
Vo3
ENABLE
GND
GND
GND
GND
GND
VOUT
VOUT
VOUT
VIN
+VS
VOUT
GND
GND
GND
GND
GND
GND
VOUT
VOUT
VOUT
VIN
VIN
VIN
VIN
VIN
VIN
+VS
VOUT
GND
GND
GND
GND
GND
GND
VOUT
VOUT
VOUT
+VS
VOUT
GND
GND
GND
GND
GND
GND
VOUT
VOUT
VOUT
47uF
-VS
-VS
22uF
220uF 47uF 47uF 22uF 220uF 47uF 47uF 22uF
220uF 47uF 47uF 22uF
POL1
-VS
-VS
Figure 11. Complete Schematic of Application with Three Independent Outputs. Intermediate Bus Voltage is from 8V to 14V.
In this application four POL converters are configured to deliver three independent output voltages. POL1 and
POL2 are connected in parallel for increased output current. Output voltages are programmed with the resistors
connected between TRIM and MARGIN pins of individual converters.
POL1 is configured as a master (IM pin is grounded) and all other POL converters are synchronized to the
switching frequency of POL1.
All converters are controlled by the common ENABLE signal. Turn-on and turn-off processes of the system are
illustrated by pictures in Figure 6 and Figure 7.
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 11 of 14
7. Pin Assignments a nd Description
Pin
Name Pin
Number Pin
Type Buffer
Type Pin Description Notes
OK 3 I/O PU Fault Status Connect to OK pin of other Z- POLs. Leave
open, if not used
SYNC 5 I/O PU
Frequency Synchronization
Line
Connect to SYNC pin of other Z-POLs or to an
external clock generator
PGOOD 4 I/O PU Power Good
CS 6 I/O PU Current Share/Sense
Connect to CS pin of other Z-POLs connected in
parallel
IM 16 I PU Master Mode Tie to GND to make the POL the clock master or
leave open to synchronize to external clock
CCA 15 I PU
Compensation Coefficient
Address Tie to GND for 0 or leave open for 1
MARGIN 14 A Output Voltage Margining To program the output voltage, connect a
resistor between MARGIN and TRIM
EN 9 I PU Enable POL is ON when the pin is high or floating. POL
is OFF when the pin is low or connected to GND
TRIM 1 A Output Voltage Trim To program the output voltage, connect a
resistor between MARGIN and TRIM
-VS 10 I A Negative Voltage Sense Connect to the negative point close to the load
+VS 11 I A Positive Voltage Sense Connect to the positive point close to the load
VOUT 18, 20,
22,24 P Output Voltage
GND 7, 8, 17,
19, 21, 23 P Power Ground
VIN 12, 13 P Input Voltage
Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 12 of 14
8. Safety
The ZY2160 POL converters do not provide
isolation from input to output. The input devices
powering ZY2160 must provide relevant isolation
requirements according to all IEC60950 based
standards. Nevertheless, if the system using the
converter needs to receive safety agency approval,
certain rules must be followed in the design of the
system. In particular, all of the creepage and
clearance requirements of the end-use safety
requirements must be observed. These
requirements are included in UL60950 - CSA60950-
00 and EN60950, although specific applications may
have other or additional requirements.
The ZY2160 POL converters have no internal fuse.
If required, the external fuse needs to be provided to
protect the converter from catastrophic failure. Refer
to the “Input Fuse Selection for DC/DC converters”
application note on www.power-one.com for proper
selection of the input fuse. Both input traces and the
chassis ground trace (if applicable) must be capable
of conducting a current of 1.5 times the value of the
fuse without opening. The fuse must not be placed
in the grounded input line.
Abnormal and component failure tests were
conducted with the POL input protected by a fast-
acting 32V, 25A, fuse. If a fuse rated greater than
25A is used, additional testing may be required.
In order for the output of the ZY2160 POL converter
to be considered as SELV (Safety Extra Low
Voltage), according to all IEC60950 based
standards, the input to the POL needs to be supplied
by an isolated secondary source providing a SELV
also.
9. Pin and Feature Descripti on
9.1 OK, Fault Status
The open drain input/output with the internal pull-up
resistor. The POL converter pulls its OK pin low, if a
fault occurs. Pulling low the OK input by an external
circuitry turns off the POL converter.
9.2 SYNC, Frequency Synchronization Line
The bidirectional input/output with the internal pull-up
resistor. If the POL converter is configured as a
master, the SYNC line propagates clock to other
POL converters. If the POL converter is configured
as a slave, the internal clock recovery circuit
synchronizes the POL converter to the clock of the
SYNC line.
9.3 IM, Interleave Mode
The input with the internal pull-up resistor. When the
pin is left floating, the switching frequency is
determined by an external clock applied to the SYNC
pin. Pulling the IM pin low configures a POL
converter as a master. The master determines the
clock on the SYNC line.
9.4 PG, Power Good
The open drain input/output with the internal pull-up
resistor. The pin is pulled low by the POL converter,
if the output voltage is outside of the window defined
by the Power Good High and Low thresholds.
Note: See the No-Bus Application Note for recommendations on
PG deglitching.
9.5 CCA, Compensation Coefficient Address
Inputs with internal pull-ups to select one of 2 sets of
digital filter coefficients optimized for different
characteristics of output capacitance.
9.6 CS, Current Share/Sense Bus
The open drain digital input/output with the internal
pull-up resistor. The duty cycle of the digital signal is
proportional to the output current of the POL
converter. External capacitive loading of the pin
shall be avoided.
9.7 MARGIN, Output Voltage Margining
The output of the 2V internal voltage reference that
is used to program the output voltage of the POL
converter.
9.8 TRIM, Output Voltage Trim
The input of the TRIM comparator for the output
voltage programming.
The output voltage is programmed by a single
resistor connected between MARGIN and TRIM
pins.
9.9 EN, Enable
The input with the internal pull-up resistor. The POL
converter is turned off, when the pin is pulled low
9.10 –VS and +VS
The differential voltage input of the POL converter
feedback loop.
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 13 of 14
10. Application Information
10.1 Output Voltage Programming
Resistance of the trim resistor is determined from the
equation below:
,
)5.5(20
OUT
OUT
TRIM VV
R
kΩ
where VOUT is the desired output voltage in Volts.
If the RTRIM is open or the TRIM pin is shorted to
PGND, the VOUT=0.5V.
10.2 Output Voltage Margining
Margining can be implemented by changing the
resistance between the REF and TRIM pins.
Figure 12. Margining Configuration
In the schematic shown in Figure 12, the nominal
output voltage is set with the trim resistor RTRIM
calculated from the equation in the paragraph 10.1.
Resistors RUP and RDOWN are added to margin the
output voltage up and down respectively and
determined from the equations below.
%
%5
20
20
VVR
R
R
RTRIM
TRIM
TRIM
UP , kΩ
%100
%
20 V
V
RR TRIMDOWN , kΩ
where RTRIM is the value of the trim resistor in kΩ and
ΔV% is the absolute value of desired margining
expressed in percents of the nominal output voltage.
During normal operation the resistors are removed
from the circuit by the switches. The “Margining
Down” switch is normally closed shorting the resistor
RDOWN while the “Margining Up” switch is normally
open disconnecting the resistor RUP.
An alternative configuration of the margining circuit is
shown in Figure 13. In the configuration both
switches are normally open that may be
advantageous in some implementations.
Figure 13. Alternative Margining Configuration
RUP and RDOWN for this configuration are determined
from the following equations:
%
%5
20
20
VVR
R
R
RTRIM
TRIM
TRIM
UP , kΩ
%
%100
20
20
VV
R
R
RTRIM
TRIM
DOWN , kΩ
Caution: Noise injected into the TRIM node may affect accuracy
of the output voltage and stability of the POL
converter. Always minimize the PCB trace length from
the TRIM pin to external components to avoid noise
pickup.
Refer to No-BusTM POL Converters. Application
Note on www.power-one.com for more application
information on this and other product features.
MARGIN
TRIM
POL
GND
R
DOWN
RTRIM
Margining
Down Switch
(normally
closed)
Margining
Up Switch
(normally
open)
R
UP
MARGIN
TRIM
POL
GND
RTRIM
RDOWN
Margining
Down Switch
(normally
open)
Margining
Up Switch
(normally
open)
RUP
ZY2160 60A No-Bus POL Data Sheet
8V to 14V Input 0.5V to 2.75V Output
ZD-01966 Rev. 1.1, 30-Jun-10 www.power-one.com Page 14 of 14
11. Mechanical Drawings
All Dimensions are in mm
Tolerances: XX.X: 0.1 XX.XX: 0.05
Figure 14. Mechanical Drawing
Figure 15. Recommended Footprint – Top View
Notes:
1. NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical
components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written
consent of the respective divisional president of Power-One, Inc.
2. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on
the date manufactured. Specifications are subject to change without notice.
