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NCP1400A
100 mA, Fixed Frequency
PWM Step−Up Micropower
Switching Regulator
The NCP1400A series are micropower step−up DC to DC
converters that are specifically designed for powering portable
equipment from one or two cell battery packs. These devices are
designed to startup with a cell voltage of 0.8 V and operate down to
less than 0.2 V. With only four external components, this series allows
a simple means to implement highly efficient converters that are
capable of up to 100 mA of output current.
Each device consists of an on−chip fixed frequency oscillator, pulse
width modulation controller, phase compensated error amplifier that
ensures converter stability with discontinuous mode operation,
soft−start, voltage reference, driver, and power MOSFET switch with
current limit protection. Additionally, a chip enable feature is provided
to power down the converter for extended battery life.
The NCP1400A device series are available in the Thin SOT23−5
package with seven standard regulated output voltages. Additional
voltages that range from 1.8 V to 4.9 V in 100 mV steps can be
manufactured.
Features
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5
1
THIN SOT23−5
SN SUFFIX
CASE 483
PIN CONNECTIONS AND
MARKING DIAGRAM
CE
OUT
1
2
3
5 LX
xxxAYW
G
G
•
Extremely Low Startup Voltage of 0.8 V
•
Operation Down to Less than 0.2 V
•
Only Four External Components for Simple Highly Efficient
•
•
•
•
•
•
•
•
•
•
•
•
•
Converters
Up to 100 mA Output Current Capability
Fixed Frequency Pulse Width Modulation Operation
Phase Compensated Error Amplifier for Stable Converter Operation
Chip Enable Power Down Capability for Extended Battery Life
Pb−Free Packages are Available
NC
4 GND
(Top View)
xxx
A
Y
W
G
= Marking
= Assembly Location
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the ordering
information section on page 2 of this data sheet.
Typical Applications
OUT
2
NC
3
NCP1400A
Cellular Telephones
Pagers
Personal Digital Assistants
Electronic Games
Digital Cameras
Camcorders
Handheld Instruments
White LED Torch Light
V
IN
CE
1
LX
5
V
OUT
GND
4
Figure 1. Typical Step−Up Converter
Application
©
Semiconductor Components Industries, LLC, 2006
1
March, 2006 − Rev. 11
Publication Order Number:
NCP1400A/D
NCP1400A
ORDERING INFORMATION
Device
NCP1400ASN19T1
NCP1400ASN19T1G
NCP1400ASN22T1
NCP1400ASN22T1G
NCP1400ASN25T1
NCP1400ASN25T1G
NCP1400ASN27T1
NCP1400ASN27T1G
NCP1400ASN30T1
NCP1400ASN30T1G
NCP1400ASN33T1
NCP1400ASN33T1G
NCP1400ASN38T1
NCP1400ASN38T1G
NCP1400ASN45T1
NCP1400ASN45T1G
NCP1400ASN50T1
NCP1400ASN50T1G
NOTE:
Output
Voltage
1.9 V
1.9 V
2.2 V
2.2 V
2.5 V
2.5 V
2.7 V
2.7 V
3.0 V
3.0 V
3.3 V
3.3 V
3.8 V
3.8 V
4.5 V
4.5 V
5.0 V
5.0 V
180 KHz
Switching
Frequency
Marking
DAI
DAI
DCN
DCN
DAV
DAV
DAA
DAA
DAB
DAB
DAJ
DAJ
DBK
DBK
DBL
DBL
DAD
DAD
Package
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
Thin SOT23−5
Thin SOT23−5
(Pb−Free)
3000 / Tape & Reel
(7 Inch Reel)
Shipping
†
The ordering information lists seven standard output voltage device options. Additional devices with output voltage ranging from
1.8 V to 5.0 V in 100 mV increments can be manufactured. Contact your ON Semiconductor representative for availability.
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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2
NCP1400A
ABSOLUTE MAXIMUM RATINGS
Rating
Power Supply Voltage (Pin 2)
Input/Output Pins
LX (Pin 5)
LX Peak Sink Current
CE (Pin 1)
Input Voltage Range
Input Current Range
Thermal Resistance Junction to Air
Operating Ambient Temperature Range (Note 2)
Operating Junction Temperature Range
Storage Temperature Range
Symbol
V
OUT
V
LX
I
LX
V
CE
I
CE
R
qJA
T
A
T
J
T
stg
Value
−0.3 to 6.0
−0.3 to 6.0
400
−0.3 to 6.0
−150 to 150
250
−40 to +85
−40 to +125
−55 to +150
Unit
V
V
mA
V
mA
°C/W
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM)
$2.0
kV per JEDEC standard: JESD22−A114.
Machine Model (MM)
$200
V per JEDEC standard: JESD22−A115.
2. The maximum package power dissipation limit must not be exceeded.
TJ(max)
*
TA
PD
+
R
qJA
3. Latchup Current Maximum Rating:
$150
mA per JEDEC standard: JESD78.
4. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
ELECTRICAL CHARACTERISTICS
(For all values T
A
= 25°C, unless otherwise noted.)
Characteristic
OSCILLATOR
Frequency (V
OUT
= V
SET
x 0.96, Note 5)
Frequency Temperature Coefficient (T
A
= −40°C to 85°C)
Maximum PWM Duty Cycle (V
OUT
= V
SET
x 0.96)
Minimum Startup Voltage (I
O
= 0 mA)
Minimum Startup Voltage Temperature Coefficient (T
A
= −40°C to 85°C)
Minimum Operation Hold Voltage (I
O
= 0 mA)
Soft−Start Time (V
OUT
u
0.8 V)
LX (PIN 5)
LX Pin On−State Sink Current (V
LX
= 0.4 V)
Device Suffix:
19T1
22T1
25T1
27T1
30T1
33T1
38T1
45T1
50T1
Voltage Limit (V
OUT
= V
CE
= V
SET
x 0.96, V
LX
“L’’ Side)
Off−State Leakage Current (V
LX
= 5.0 V, T
A
= −40°C to 85°C)
5. V
SET
means setting of output voltage.
6. CE pin is integrated with an internal 150 nA pullup current source.
I
LX
80
80
80
100
100
100
100
100
100
V
LXLIM
I
LKG
0.65
−
90
90
120
125
130
135
145
155
160
0.8
0.5
−
−
−
−
−
−
−
−
−
1.0
1.0
V
mA
mA
f
OSC
Df
D
MAX
V
start
DV
start
V
hold
t
SS
144
−
68
−
−
0.3
0.5
180
0.11
75
0.8
−1.6
−
2.0
216
−
82
0.95
−
−
−
kHz
%/°C
%
V
mV/°C
V
ms
Symbol
Min
Typ
Max
Unit
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3
NCP1400A
ELECTRICAL CHARACTERISTICS
(continued)
(For all values T
A
= 25°C, unless otherwise noted.)
Characteristic
CE (PIN 1)
CE Input Voltage (V
OUT
= V
SET
x 0.96)
High State, Device Enabled
Low State, Device Disabled
CE Input Current (Note 6)
High State, Device Enabled (V
OUT
= V
CE
= 5.0 V)
Low State, Device Disabled (V
OUT
= 5.0 V, V
CE
= 0 V)
TOTAL DEVICE
Output Voltage (V
IN
= 0.7 x V
OUT
, I
O
= 10 mA)
Device Suffix:
19T1
22T1
25T1
27T1
30T1
33T1
38T1
45T1
50T1
Output Voltage Temperature Coefficient (T
A
= −40°C to +85°C)
Device Suffix:
19T1
22T1
25T1
27T1
30T1
33T1
38T1
45T1
50T1
Operating Current 2 (V
OUT
= V
CE
= V
SET
+0.5 V, Note 5)
Off−State Current (V
OUT
= 5.0 V, V
CE
= 0 V, T
A
= −40°C to +85°C, Note 6)
Operating Current 1 (V
OUT
= V
CE
= V
SET
x 0.96, f
OSC
= 180 kHz)
Device Suffix:
19T1
22T1
25T1
27T1
30T1
33T1
38T1
45T1
50T1
5. V
SET
means setting of output voltage.
6. CE pin is integrated with an internal 150 nA pullup current source.
V
OUT
1.853
2.145
2.438
2.633
2.925
3.218
3.705
4.3875
4.875
DV
OUT
−
−
−
−
−
−
−
−
−
I
DD2
I
OFF
I
DD1
−
−
−
−
−
−
−
−
−
23
27
32
32
37
37
44
53
70
50
60
60
60
60
60
65
75
100
−
−
100
100
100
100
100
100
150
150
150
7.0
0.6
−
−
−
−
−
−
−
−
−
15
1.5
mA
mA
mA
1.9
2.2
2.5
2.7
3.0
3.3
3.8
4.5
5.0
1.948
2.255
2.563
2.768
3.075
3.383
3.895
4.6125
5.125
ppm/°C
V
V
V
CE(high)
V
CE(low)
I
CE(high)
I
CE(low)
0.9
−
−0.5
−0.5
−
−
0
0.15
−
0.3
mA
0.5
0.5
Symbol
Min
Typ
Max
Unit
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4
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