AME, Inc.
1
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
l 1Ω Internal Switch
l Use Small Surface Mount Components
l Adjust Output Voltage up to -28V
l 1.5V to 5.5V Input Voltage Range
l Input under Voltage Lockout
l 0.1 µA Shutdown Current
The AME5150 is an inverting DC/DC converter operat-
ing from 1.5V to 5.5V input voltage range. It is capable of
producing up to -28V of regulated negative output volt-
age. Built-in current-limit and fixed off-time control scheme
of AME5150 provides high efficiency over a wide range of
load conditions.
Low supply current, 400ns fixed off-time, small pack-
age, and tiny external components makes AME5150 a
extremely compact and high efficiency voltage biasing
solution for battery-powered application. The AME5150
is available in a small SOT-25/TSOT-25 packages.
l Electronic Information Organizers
l Palmtops
l Cellular and Portable Phones
l Portable Audio Systems
l Various Multi-function Power Supplies
n General Description
n Features
n Applications
n Typical Application
Figure. 1
1-cell Li-lon to -15V inverting converter
Figure. 2
±
15V Dual output converter
NFB
2
1
I
R
V
VV
RNFB
NFB
OUT
+
−
=
l Internal Soft Star
l All AME's Lead Free Products Meet RoHS
Standards
C1
4.7µF
VIN
1.5V~5.5V
C2
0.47µF
L1
10µHL2
10µH
CF
15pF R2
267KΩ
R1
24.9KΩ
C3
4.7µF
-15V
AME5150
IN
GND
EN
SW
NFB
D1
C1
4.7µF
VIN
1.5V~5.5V
C2
0.47µF
L1
10µH
CF
15pF R2
267KΩ
R1
24.9KΩ
C3
4.7µF
-15V
5mA
AME5150
IN
GND
EN
SW
NFB
D1
D2
D4
D3 C5
1µF
+15V
5mA
C4
1µF
AME, Inc.
2
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
n Function Block Diagram
Figure. 3
+
-CL
Adjust
+
-
Current Limit
400ns one
Shot
UVLO
Logic
control Driver
VIN
Vref
Cs
Enable
Comp
GND
SW
NFB
IN
VOUT
(EXTERNAL)
R1
R2
(EXTERNAL)
C1
VIN C2
L1 L2
D1
VOUT
C3
EN
AME, Inc.
3
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
n Pin Configuration
AME5150AEEV
1. SW
2. GND
3. NFB
4. EN
5. IN
Die Attach:
Conductive Epoxy
SOT-25/TSOT-25
Top View
n Pin Description
1 3
AME5150
5 4
2
Pin Number Pin Name Pin Description
1SW Power Switch input.
This is the drain of the internal NMOS power switch. Minimize the metal
trace area connected to this pin to minimize EMI.
2GND Ground.
Tie directly to ground plane.
3NFB
Output voltage feedback input.
Set the output voltage by selecting values for R1 and R2 using:
4EN Enable control input, active high.
The enable pin is an active high control. Tie this pin above 1.5V to enable
the device. Tie this pin below 0.4V to turn off the device.
5IN Analog and Power input.
Input Supply Pin. Bypass this pin with a capacitor as close to the device
as possible.
NFB
2
1
I
R
V
VV
RNFB
NFB
OUT
+
−
=
AME, Inc.
4
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
n Ordering Information
Note: ww represents the date code and pls refer to Date Code Rule on Package Dimension.
* A line on top of the first letter represents lead free plating such as BISww.
Please consult AME sales office or authorized Rep./Distributor for the availability of package type.
Operating Ambient Temperature Range
Number of Pins
Package Type
Pin Configuration
Special Feature
AME5150 x x x x xxx x
Output Voltage
n Ordering Information
A
1. SW
E:
-40
O
C to 85
O
C
E:
SOT-2X
V:
5
ADJ:
Adjustable
Z:
Lead free
(SOT-25)
2. GND
Y:
Lead free
(TSOT-25)
3. NFB
& Low profile
4. EN
5. IN
Output Voltage Special Feature
Pin
Configuration Operating Ambient
Temperature Range Package
Type
Number
of
Pins
Part Number Marking* Output Voltage Package Operating Ambient
Temperature Range
AME5150AEEVADJZ BISww ADJ SOT-25 -40OC to 85OC
AME5150AEEVADJY BISww ADJ TSOT-25 -40OC to 85OC
AME, Inc.
5
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
Parameter Package Die Attach Symbol Maximum Unit
Thermal Resistance*
(Junction to Case) θJC81
Thermal Resistance
(Junction to Ambient) θJA 260
Internal Power Dissipation PD400 mW
350 oC
oC / W
Solder Iron (10Sec)**
SOT-25
TSOT-25 Conductive Epoxy
n Absolute Maximum Ratings
n Thermal Information
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
* HBM B: 2000~3999V
n Recommented Operating Conditions
* Measure θJC on backside center of molding compund if IC has no tab.
** MIL-STD-202G 210F
Parameter Symbol Rating Unit
Ambient Temperature Range TA- 40 to 85
Junction Temperature Range TJ- 40 to 125
Storage Temperature Range TSTG - 65 to 150
OC
Parameter Symbol Maximum Unit
Input Supply Voltage VIN 6V
EN, NFB Voltages EN,VNFB VIN V
SW Voltage VSW VOUT + 0.3 V
N-Channel Switch Sink Current ISW 600 mA
ESD Classification B*
AME, Inc.
6
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
Parameter Symbol Min Typ Max Units
Input Voltage VIN 1.5 5.5 V
Quiescent Current IQ65 90 µA
Shutdown Current ISD 0.1 1µA
Feedback Trip Point VNFB -1.205 -1.23 -1.255 V
Feedback Hysteresis VNFB Hysteresis 5mV
Switch Current Limit ICL 300 375 450 mA
NFB Pin Bias Current INFB 22.7 µA
Switch RDSON RDSON 0.6 11.4 Ω
Switch Off Time tOFF 400 nS
Input Undervoltage Lockout UVLO 1.2 1.4 V
EN Input Threshold
(High) (Enable the device) 1.5
EN Input Threshold
(Low) (Shutdown) 0.4 V
VNFB = -1.23V
EN Threshold
Test Condition
EN = 0V
VIN = 2V, VNFB = -1.3V
n Electrical Specifications
VIN = 3.6V, EN = VIN, TA = 25oC, CIN = 4.7µF, IL = 0A, unless otherwise noted.
AME, Inc.
7
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
n Detailed Description
The AME5150 features a constant off-time control
scheme. Operation can be best understood by referring
to Figure 3. When the voltage at the NFB pin is larger
than -1.23V, the Enable Comp in Figure 3 enables the
device and the NMOS switch is turned on, pulling the
SW pin to ground. When the NMOS switch is on, load
current is supplied by the output capacitor C3. Once the
current in the inductor reaches the peak current limit, the
400ns One Shot turns off the NMOS switch. During this
time the energy stored in the inductor is transferred to C3
and the load. After the 400ns off-time the NMOS switch
is turned on and energy is stored in the inductor again.
This energy transfer from the inductor to the output causes
a stepping effect in the output ripple.
This cycle is continued until the voltage at NFB pin
reaches -1.23V. When NFB pin reaches this voltage, the
enable comparator then disables the device turning off
the NMOS switch and reducing the quiescent current of
the device to 65µA. The load current is then supplied
solely by C3 indicated by the gradually decreasing volt-
age at the output. When the NFB pin drops slightly be-
low -1.23V, the enable comparator enables the device
and begins the cycle as described previously. The EN
pin can be used to turn off the AME5150 and reduce the
quiescent current to 0.1µA.
AME, Inc.
8
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
Figure. 4
1-cell Li-lon to -15V inverting charge pump converter
n Typical Application
C1
4.7µF
VIN
1.5V~5.5V
C2
0.47µF
L1
10µHD2
CF
15pF R2
267KΩ
R1
24.9KΩ
C3
4.7µF
-15V
AME5150
IN
GND
EN
SW
NFB
D1
AME, Inc.
9
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
Efficiency vs. Loading
300
350
400
450
500
550
600
650
700
-40 -20 020 40 60 80 100
Temperature (oC)
Switch Off Time (ns)
Switch off Time vs. Temperature
INFB vs. Temperature IQ vs. Temperature
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
-40 -20 0 20 40 60 80 100
Temperature (oC)
EN Threshold (V)
EN Threshold High vs. Temperature EN Threshold Low vs. Temperature
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
-40 -20 020 40 60 80 100
Temperature (oC)
EN Threshold (V)
55
60
65
70
75
80
12 3 4 5 6 78 9 1011121314151617181920212223242526
Load Current (mA)
Efficiency (%)
VIN = 4.2V VIN = 3.6V
VIN = 2.7V
VOUT = -15V
0.9
1.1
1.3
1.5
1.7
1.9
2.1
2.3
2.5
2.7
-40 -20 0 20 40 60 80 100
Temperature (oC)
INFB (µA)
30
40
50
60
70
80
90
-40 -20 0 20 40 60 80 100
Temperature (oC)
IQ (µA)
AME, Inc.
10
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
-40 -20 0 20 40 60 80 100
Temperature (oC)
RDSON (Ω)
RDSON vs. Temperature VNFB vs. Temperature
UVLO vs. Temperature
200
250
300
350
400
450
500
550
600
-40 -20 0 20 40 60 80 100
Temperature (oC)
Switch Current Limit (mA)
Switch Current Limit vs. Temperature
1.18
1.19
1.20
1.21
1.22
1.23
1.24
1.25
-40 -20 020 40 60 80 100
Temperature (oC)
VNFB (V)
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
-40 -20 0 20 40 60 80 100
Temperature (oC)
UVLO (V)
AME, Inc.
11
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
SOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm
n Tape and Reel Dimension
SOT-25
Carrier Tape, Number of Components Per Reel and Reel Size
W
P
AME AME
PIN 1
n Date Code Rule
Year
AAAWWxxx0
AAAWWxxx1
AAAWWxxx2
AAAWWxxx3
AAAWWxxx4
AAAWWxxx5
AAAWWxxx6
AAAWWxxx7
AAAWWxxx8
AAAWWxxx9
Marking Date Code
AME, Inc.
12
Micropower Inverting
DC/DC Converter
AME5150
Rev.A.01
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
TSOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm
n Tape and Reel Dimension
TSOT-25
Carrier Tape, Number of Components Per Reel and Reel Size
W
P
AME AME
PIN 1
AME, Inc.
13
AME5150 Micropower Inverting
DC/DC Converter
Rev.A.01
n Package Dimension
SOT-25
L
Top View Side View
Front View
θ1
D
S1
e
E
H
A1
b
A
MIN MAX MIN MAX
A
A10.00 0.15 0.0000 0.0059
b0.30 0.55 0.0118 0.0217
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.60 3.00 0.10236 0.11811
L
θ10o10o0o10o
S1
0.37BSC 0.0146BSC
0.95BSC 0.0374BSC
1.90 BSC 0.07480 BSC
SYMBOLS MILLIMETERS INCHES
1.20REF 0.0472REF
L
Top View Side View
Front View
θ1
D
S1
e
E
H
A1
b
A
TSOT-25
MIN MAX MIN MAX
A+A10.90 1.25 0.0354 0.0492
b0.30 0.50 0.0118 0.0197
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ10o10o0o10o
S1
1.90 BSC 0.07480 BSC
SYMBOLS MILLIMETERS INCHES
0.35BSC 0.0138BSC
0.95BSC 0.0374BSC
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
AME, Inc. , Auguest 2007
Document: 1231-DS5150-A.01
Corporate Headquarter U.S.A.(Subsidiary)
AME, Inc. Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan, R.O.C. Santa Clara, CA. 95054-2438
Tel: 886 2 2627-8687 Tel : (408) 988-2388
Fax: 886 2 2659-2989 Fax: (408) 988-2489
www.ame.com.tw
E-Mail: sales@ame.com.tw
