ZXCL5213V25, ZXCL5213V26, ZXCL5213V28, ZXCL5213V30, ZXCL5213V33, ZXCL5213V40
ZXCL250, ZXCL260, ZXCL280, ZXCL300, ZXCL330, ZXCL400
DESCRIPTION
The ZXCL series have been designed with space
sensitive systems in mind. They are available in the
ultra small SC70-5 package, which is half the size of
other SOT23 based regulators.
The devices can be used with all types of output
capacitors including low ESR ceramics and typical
dropout voltage, is only 85mV at 50mA load. Supply
current is minimised with a ground pin current of only
50␮A at full 150mA load. Logic control allows the
devices to be shut down, consuming typically less than
10nA. These features make the device ideal for battery
powered applications where power economy is
critical.
FEATURES
•5-pin SC70 package for the ultimate in space
saving
•5-pin SOT23 industry standard pinout
•Can be used with all types of output capacitor
•Low 85mV dropout at 50mA load
•50␮A ground pin current with full 150mA load
•Typically less than 10nA ground pin current on
shutdown
•2.5, 2.6, 2.8, 3, 3.3 and 4 volts output
•Very low noise, without bypass capacitor
•Thermal overload and over-current protection
•-40 to +85°C operating temperature range
•No-load stable
PACKAGE FOOTPRINT
For applications requiring improved performance over
alternative devices, the ZXCL is also offered in the 5 pin
SOT23 package with an industry standard pinout.
The devices feature thermal overload and over-current
protection and are available with output voltages of
2.5V, 2.6V, 2.8V, 3V, 3.3V and 4V. Other voltage options
between 1.5V and 4V can be provided. Contact Zetex
marketing for further information.
The ZXCL series are manufactured using CMOS
processing, however advanced design techniques
mean that output noise is improved even when
compared to other bipolar devices.
APPLICATIONS
•Cellular and Cordless phones
•Palmtop and laptop computers
•PDA
•Hand held instruments
•Camera, Camcorder, Personal Stereo
•PCMCIA cards
•Portable and Battery-powered equipment
No-Load Stability, the ZXCL device will maintain regulation and is stable
with no external load. e.g. CMOS RAM applacations.
ZXCL Series
ISSUE 7 - AUGUST 2002
1
MICROPOWER SC70-5 & SOT23-5 LOW DROPOUT REGULATORS
TYPICAL APPLICATION CIRCUIT
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage with respect to GND
VIN -0.3V to 7.0V
EN-0.3V to 10V
VO-0.3V to 5.5V
Package Power Dissipation (TA=25°C)
SC70-5 300mW (Note 1)
SOT23-5 450mW (Note 1)
Output short circuit duration Infinite
Continuous Power Dissipation Internally limited
Operating Temperature Range -40°C to +85°C
Storage Temperature Range -55°C to +125°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
conditions for extended periods may affect device reliability.
ZXCL Series
ISSUE 7 - AUGUST 2002
2
SYMBOL PARAMETER CONDITIONS LIMITS UNITS
MIN TYP MAX
VIN Input Voltage (note2) 5.5 V
VOOutput Voltage IO= 1mA
ZXCL250 / 5213V25
ZXCL260 / 5213V26
ZXCL280 / 5213V28
ZXCL300 / 5213V30
ZXCL330 / 5213V33
ZXCL400 / 5213V40
IO= 100mA
VO+0.5V<V
IN <V
IN max.
ZXCL250 / 5213V25
ZXCL260 / 5213V26
ZXCL280 / 5213V28
ZXCL300 / 5213V30
ZXCL330 / 5213V33
ZXCL400 / 5213V40
2.450
2.548
2.744
2.940
3.234
3.920
2.425
2.522
2.744
2.910
3.201
3.880
2.5
2.6
2.8
3.0
3.3
4.0
2.550
2.652
2.856
3.060
3.366
4.080
2.575
2.678
2.884
3.090
3.399
4.120
V
V
∆VO/∆TOutput Voltage
Temperature
Coefficient
-15 ppm/°C
IO(MAX) Output Current ZXCL250 / 5213V25 only 150
100 mA
IOLIM Over Current Limit ZXCL250 / 5213V25 only 160
105 230 800
750 mA
IQGround pin current No Load
IO= 150mA,
IO= 100mA,
25
50
40
50
120
100
␮A
␮A
␮A
ELECTRICAL CHARACTERISTICS
VIN = VO+ 0.5V, all values at TA= 25 C(Unless otherwise stated)
ZXCL Series
ISSUE 7 - AUGUST 2002
3
SYMBOL PARAMETER CONDITIONS LIMITS UNITS
MIN TYP MAX
VDO Dropout Voltage
Note 3 ZXCL250 / 5213v25
IO=10mA
IO=50mA
IO=100mA
ZXCL260 / 5213v26
IO=10mA
IO=50mA
IO=100mA
ZXCL280 / 5213v28
IO=10mA
IO=50mA
IO=100mA
ZXCL300 / 5213v30
IO=10mA
IO=50mA
IO=100mA
ZXCL330 / 5213v33
IO=10mA
IO=50mA
IO=100mA
ZXCL400 / 5213v40
IO=10mA
IO=50mA
IO=100mA
15
85
163
15
85
155
15
85
140
15
85
140
15
85
140
15
85
140
325
310
280
280
280
280
mV
mV
mV
mV
mV
mV
⌬VLNR Line Regulation VIN=(VO+0.5V) to 5.5V, IO=1mA 0.02 0.1 %/V
⌬VLDR Load Regulation IO=1mA to 100mA 0.01 0.04 %/mA
ENOutput Noise Voltage f=10Hz to 100kHz, CO=10µF, 50 µVrms
VENH Enable pin voltage for
normal operation TA= -40°C
2
2.2
10 V
VENL Enable pin voltage for
output shutdown 00.8V
VENHS Enable pin hysteresis 150 mV
IEN Enable Pin input
current VEN=5.5V 100 nA
IQSD Shutdown supply
current VEN=0V 1 µA
TSD Thermal Shutdown
Temperature 125 165 °C
ELECTRICAL CHARACTERISTICS
VIN = VO+ 0.5V, all values at TA= 25 C(Unless otherwise stated)
Device testing is performed at TA=25⬚C. Device thermal performance is guaranteed by design.
Note1: Maximum power dissipation is calculated assuming the device is mounted on a PCB measuring 2 inches
square
Note 2: Output Voltage will start to rise when VIN exceeds a value or approximately 1.3V. For normal
operation, VIN (min) > VOUT (nom) + 0.5V.
Note 3: Dropout voltage is defined as the difference between VIN and VO, when VOhas dropped 100mV below
its nominal value. Nominal value of VOis defined at VIN=VO+0.5V.
ZXCL Series
ISSUE 7 - AUGUST 2002
4
-50-250 255075100
2.79
2.80
2.81
-50 -25 0 25 50 75 100
23.0
23.2
23.4
23.6
23.8
24.0
24.2
24.4
24.6
24.8
25.0
012345
0
5
10
15
20
25
30
0 25 50 75 100 125 150
20
25
30
35
40
45
50
55
60
0123456
0
1
2
3
4
5
6
0 25 50 75 100 125 150 175
0.00
0.05
0.10
0.15
0.20
0.25
VIN =3.3V
No Load
Output Voltage v Temperature
Output Voltage (V)
Temperature (°C)
VIN =3.3V
No Load
Ground Current v Temperature
Ground Current (µA)
Temperature (°C)
No Load
Ground Current v Input Voltage
Ground Current (µA)
Input Voltage (V)
VIN =3.3V
VIN =5V
Ground Current v Load Current
Ground Current (µA)
Load Current (mA)
VIN
IOUT = 100mA
IOUT =1mA
Input to Output Characteristics
Voltage (V)
Input Voltage (V) Dropout Voltage v Output Current
Dropout Voltage (V)
Output Current (mA)
TYPICAL CHARACTERISTICS (ZXCL280 / 5213 shown)
ZXCL Series
ISSUE 7 - AUGUST 2002
5
0.0 0.1 0.2 0.3 0.4 0.5
-4
-3
-2
-1
0
1
3
4
5
6
0 102030405060708090100
0
1
2
3
4
5
6
0.0 0.1 0.2 0.3 0.4 0.5
-4
-3
-2
-1
0
1
3
4
5
6
0.0 0.1 0.2 0.3 0.4 0.5
-100
-50
0
50
100
300
350
400
10 100 1k 10k 100k 1M
0.01
0.1
1
10
10 100 1k 10k 100k 1M
0
10
20
30
40
50
60
70
80
0
-20
20
10
-10
COUT =1µF
Tr&T
f=2.5µs
Line Rejection IL= 100mA
∆VOUT (mV) VIN (V)
Time (ms)
VIN =5V
IL=1mA
IL= 100mA
Enable
VIN =3.3V
IL=1mA
IL= 100mA
COUT =1µF
Start-Up Response
Voltage (V)
Time (µs)
COUT =1µF
Tr&T
f=2.5µs
0
∆VOUT (mV) VIN
(V)
-10
10
-20
20
Line Rejection IL=1mA
Time (ms)
100
50
COUT =10µF
COUT =1µF
COUT =10µF
COUT =1µF
VIN =5V
IL= 1mA to 50mA
0
Load Response
∆VOUT (mV) IL
(mA)
Time (ms)
IL= 100mA, COUT =1µF
IL= 100mA, COUT =10µF
No Load, COUT =10µF
No Load, COUT =1µF
Output Noise v Frequency
Noise µV/√Hz
Frequency (Hz)
All Caps Ceramic
Surface Mount
IL= 50mA
COUT =1µF
COUT =2.2µF
COUT =10µF
Power Supply Rejection v Frequency
Power Supply Rejection (dB)
Frequency (Hz)
TYPICAL CHARACTERISTICS
PIN DESCRIPTION
ZXCL Series
ISSUE 7 - AUGUST 2002
6
Pin Name Pin Function
VIN Supply Voltage
GND Ground
ENActive HIGH Enable input. TTL/CMOS logic compatible.
Connect to VIN or logic high for normal operation
N/C No Connection
VORegulator Output
SC70-5
Package Suffix – H5
Top View
SOT23-5
Package Suffix – E5
Top View
G
ND
E
N
N/C
V
IN
V
O
1
2
34
5
G
ND
E
N
N/C
V
IN
V
O
1
2
34
5
SC70-5
Package Suffix –H5
Top View
GND
EN
N/C
VIN
VO
1
2
34
5
ZXCLxxx ZXCL5213VxxZXCLxxx
CONNECTION DIAGRAMS
SCHEMATIC DIAGRAM
Input to Output Diode
In common with many other LDO regulators, the ZXCL
device has an inherent diode associated with the
output series pass transistor. This diode has its anode
connected to the output and its cathode to the input.
The internal diode is normally reverse biased, but will
conduct if the output is forced above the input by more
than a VBE (approximately 0.6V). Current will then flow
from Vout to Vin. For safe operation, the maximum
current in this diode should be limited to 5mA
continuous and 30mA peak. An external schottky diode
may be used to provide protection when this condition
cannot be satisfied.
Increased Output current
Any ZXCL series device may be used in conjunction
with an external PNP transistor to boost the output
current capability. In the application circuit shown
below, a FMMT717 device is employed as the external
pass element. This SOT23 device can supply up to 2.5A
maximum current subject to the thermal dissipation
limits of the package (625mW). Alternative devices
may be used to supply higher levels of current. Note
that with this arrangement, the dropout voltage will be
increased by the VBE drop of the external device. Also,
care should be taken to protect the pass transistor in
the event of excessive output current.
ZXCL Series
ISSUE 7 - AUGUST 2002
7
Scheme to boost output current to 2A
APPLICATIONS INFORMATION
Enable Control
A TTL compatible input is provided to allow the
regulator to be shut down. A low voltage on the Enable
pin puts the device into shutdown mode. In this mode
the regulator circuit is switched off and the quiescent
current reduces to virtually zero (typically less than
10nA) for input voltages above the minimum operating
threshold of the device. A high voltage on the Enable
pin ensures normal operation.
The Enable pin can be connected to VIN or driven from
an independent source of up to 10V maximum. (e.g.
CMOS logic) for normal operation. There is no clamp
diode from the Enable pin to VIN, so the VIN pin may be
at any voltage within its operating range irrespective of
the voltage on the Enable pin. However input voltage
rise time should be kept below 5ms to ensure
consistent start-up response.
Current Limit
The ZXCL devices include a current limit circuit which
restricts the maximum output current flow to typically
230mA. Practically the range of over-current should be
considered as minimum 160mA to maximum 800mA.
The device’s robust design means that an output short
circuit to any voltage between ground and VOUT can be
tolerated for an indefinite period.
Thermal Overload
Thermal overload protection is included on chip. When
the device junction temperature exceeds a minimum
125°C the device will shut down. The sense circuit will
re-activate the output as the device cools. It will then
cycle until the overload is removed. The thermal
overload protection will be activated when high load
currents or high input to output voltage differentials
cause excess dissipation in the device.
Start up delay
A small amount of hysteresis is provided on the Enable
pin to ensure clean switching. This feature can be used
to introduce a start up delay if required. Addition of a
simple RC network on the Enable pin provides this
function. The following diagram illustrates this circuit
connection. The equation provided enables calculation
of the delay period.
ZXCL Series
ISSUE 7 - AUGUST 2002
8
R
C
Figure 1 Circuit Connection
Td
T = RCIn V
V1.5
d(NOM)
IN
IN −
Calculation of start up delay as above
Figure 2 Start up delay (Td)
APPLICATIONS INFORMATION (Cont)
Power Dissipation
The maximum allowable power dissipation of the
device for normal operation (Pmax), is a function of the
package junction to ambient thermal resistance (θja),
maximum junction temperature (Tjmax), and ambient
temperature (Tamb), according to the expression:
Pmax = (Tjmax –Tamb) / θja
The maximum output current (Imax) at a given value of
Input voltage (VIN) and output voltage (VOUT) is then
given by
Imax =P
max / (VIN -V
OUT )
The value of θja is strongly dependent upon the type of
PC board used. Using the SC70 package it will range
from approximately 280 °C/W for a multi-layer board to
around 450°C/W for a single sided board. It will range
from 180°C/W to 300°C/W for the SOT23-5 package. To
avoid entering the thermal shutdown state, Tjmax
should be assumed to be 125°C and Imax less than the
over-current limit,(IOLIM). Power derating for the SC70
and SOT23-5 packages is shown in the following
graph.
Capacitor Selection and Regulator Stability
The device is designed to operate with all types of
output capacitor, including tantalum and low ESR
ceramic. For stability over the full operating range from
no load to maximum load, an output capacitor with a
minimum value of 1␮F is recommended, although this
can be increased without limit to improve load
transient performance. Higher values of output
capacitor will also reduce output noise. Capacitors with
ESR less than 0.5⍀are recommended for best results.
The dielectric of the ceramic capacitance is an
important consideration for the ZXCL Series operation
over temperature. Zetex recommends minimum
dielectric specification of X7R for the input and output
capacitors. For example a ceramic capacitor with X7R
dielectric will lose 20% of its capacitance over a -40⬚Cto
85⬚C temperature range, whereas a capacitor with a
Y5V dielectric loses 80% of its capacitance at -40⬚C and
75% at 85⬚C.
An input capacitor of 1␮F (ceramic or tantalum) is
recommended to filter supply noise at the device input
and will improve ripple rejection.
The input and output capacitors should be positioned
close to the device, and a ground plane board layout
should be used to minimise the effects of parasitic track
resistance.
Dropout Voltage
The output pass transistor is a large PMOS device,
which acts like a resistor when the regulator enters the
dropout region. The dropout voltage is therefore
proportional to output current as shown in the typical
characteristics.
Ground Current
The use of a PMOS device ensures a low value of
ground current under all conditions including dropout,
start-up and maximum load.
Power Supply Rejection and Load Transient Response
Line and Load transient response graphs are shown in
the typical characteristics.
These show both the DC and dynamic shift in the
output voltage with step changes of input voltage and
load current, and how this is affected by the output
capacitor.
If improved transient response is required, then an
output capacitor with lower ESR value should be used.
Larger capacitors will reduce over/undershoot, but will
increase the settling time. Best results are obtained
using a ground plane layout to minimise board
parasitics.
ZXCL Series
ISSUE 7 - AUGUST 2002
9
-40-200 20406080100
0
100
200
300
400
500
SOT23
SC70
Derating Curve
Max Power Dissipation (mW)
Temperature (°C)
ZXCL Series
ISSUE 7 - AUGUST 2002
10
SOT23-5 PACKAGE INFORMATION
CONTROLLING DIMENSIONS IN MILLIMETRES
APPROX CONVERTED DIMENSIONS IN INCHES
DIM MILLIMETRES INCHES
MIN MAX MIN MAX
A 0.90 1.45 0.0354 0.0570
A1 0.00 0.15 0.00 0.0059
A2 0.90 1.3 0.0354 0.0511
b 0.20 0.50 0.0078 0.0196
C 0.09 0.26 0.0035 0.0102
D 2.70 3.10 0.1062 0.1220
E 2.20 3.20 0.0866 0.1181
E1 1.30 1.80 0.0511 0.0708
e 0.95 REF 0.0374 REF
e1 1.90 REF 0.0748 REF
L 0.10 0.60 0.0039 0.0236
a°030030
SOT23-5 PACKAGE DIMENSIONS
DIM MILLIMETRES INCHES
MIN MAX MIN MAX
Aᎏ1.00 ᎏ0.0393
A1 ᎏ0.10 ᎏ0.0039
A2 0.70 0.90 0.0275 0.0354
b 0.15 0.30 0.006 0.0118
C 0.08 0.25 0.0031 0.0098
D 2.0 BSC 0.0787 BSC
E 2.10 BSC 0.0826 BSC
E1 1.25 BSC 0.0492 BSC
e 0.65 BSC 0.0255 BSC
e1 1.30 BSC 0.0511 BSC
L 0.26 0.46 0.0102 0.0181
a0⬚8⬚0⬚8⬚
SC70-5 PACKAGE DIMENSIONSS70-5 PACKAGE OUTLINE
CONTROLLING DIMENSIONS IN MILLIMETRES
APPROX CONVERTED DIMENSIONS IN INCHES
ZXCL Series
ISSUE 7 - AUGUST 2002
11
Europe
Zetex plc
Fields New Road
Chadderton
Oldham, OL9 8NP
United Kingdom
Telephone (44) 161 622 4422
Fax: (44) 161 622 4420
uk.sales@zetex.com
Zetex GmbH
Streitfeldstraße19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Americas
Zetex Inc
700 Veterans Memorial Hwy
Hauppauge, NY11788
USA
Telephone: (631) 360 2222
Fax: (631) 360 8222
usa.sales@zetex.com
Asia Pacific
Zetex (Asia) Ltd
3701-04 Metroplaza, Tower 1
Hing Fong Road
Kwai Fong
Hong Kong
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced
for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company
reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.
For the latest product information, log on to www.zetex.com
© Zetex plc 2002
Device Output
Voltage
V
Package Partmarking
ZXCL250H5 2.5 SC70 L25A
ZXCL260H5 2.6 SC70 L26A
ZXCL280H5 2.8 SC70 L28A
ZXCL300H5 3.0 SC70 L30A
ZXCL330H5 3.3 SC70 L33A
ZXCL400H5 4.0 SC70 L40A
ZXCL5213V25H5 2.5 SC70 L25C
ZXCL5213V26H5 2.6 SC70 L26C
ZXCL5213V28H5 2.8 SC70 L28C
ZXCL5213V30H5 3.0 SC70 L30C
ZXCL5213V33H5 3.3 SC70 L33C
ZXCL5213V40H5 4.0 SC70 L40C
ZXCL250E5 2.5 SOT23-5 L25B
ZXCL260E5 2.6 SOT23-5 L26B
ZXCL280E5 2.8 SOT23-5 L28B
ZXCL300E5 3.0 SOT23-5 L30B
ZXCL330E5 3.3 SOT23-5 L33B
ZXCL400E5 4.0 SOT23-5 L40B
ORDERING INFORMATION