JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD
Low Quiescent Current, PFM/PWM Synchronous Boost Converter
CJ9112T6
INTRODUCTION:
FEATURES:
The CJ9112T6 is a compact, high-efficiency,
fixed frequency, synchronous step-up DCDC converter.This device provides an easyto-use power supply solution for applications
powered by either one-cell, two-cell or
three-cell alkaline, NiCd, NiMH, one-cell LiIon or Li-Polymer batteries. A low-voltage
technology allows the regulator to start up
without high inrush current or output voltage
overshoot from a low voltage input. High
efficiency is accomplished by integrating the
low-resistance N-Channel boost switch and
P-Channel
switch.
All
synchronous
compensation and protection circuitry are
integrated to minimize external components.
CJ9112T6 consumes less than 14 µA from
battery, while operating at no load (VOUT =
3.3V, VIN = 1.5V). The devices provide a
true disconnect from input to output
(CJ9112T6A) or an input-to-output bypass
(CJ9112T6B), while in shutdown (EN =
GND) state. Both options consume less than
0.6 µA from battery. Output voltage is set by
a small external resistor divider.
Up to 96% Typical Efficiency
1.0A Typical Peak Input Current Limit:
IOUT > 200mA@VOUT=3.3V, VIN=1.2V
IOUT > 400mA@VOUT=3.3V, VIN=2.4V
IOUT > 400mA@VOUT=5.0V, VIN=3.3V
Low Device Quiescent Current:
-Output Quiescent Current: < 4 µA typical, device
is not switching (VOUT > VIN, excluding feedback
divider current)
-Input Sleep Current: 1 µA
-No Load Input Current: 14 µA typical
Shutdown Current: 0.6 µA typical
Low Start-up Voltage: 0.82V, 1 mA load
Low Operating Input Voltage: down to 0.65V
Adjustable Output Voltage Range: 1.8V to 5.5V
Maximum Input Voltage:
Automatic PFM/PWM Operation:
VOUT < 5.5V
-PWM Operation: 500 KHz
-PFM Output Ripple: 150 mV typical
Feedback voltage: 1.215V
Inrush Current Limiting and Internal Soft Start
(1 ms typical)
Selectable, Logic Controlled, Shutdown States:
-True Load Disconnect Option (CJ9112T6A)
-Input to Output Bypass Option (CJ9112T6B)
Over temperature Protection
Output Short Protection
APPLICATIONS:
One, Two and Three Cell Alkaline and NiMH/NiCd
Solar Cell Applications
Personal Care and Medical Products
Bias for Status LEDs
Smartphones, MP3 Players, Digital Cameras
PIN CONFIGURATION
Portable Products
DEVICE INFORMATION:
PART NUMBER
CJ9112T6
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PACKAGE
SOT-23-6L
Remote controllers, Portable Instruments
Wireless Sensors
Bluetooth Headsets
+3.3V to +5.0V Distributed Power Supply
1
Rev. - 1.0
Electrical Characteristics
BLOCK DIAGRAM
VOUT
VIN
Internal
BIAS
IZERO
Direction
Control
SW
EN
GND
.3V SOFT-START
Gate Drive
and
Shutdown
Control
Logic
Oscillator
0V
ILIMIT
ISENSE
Slope
Compensation
S
PWM/PFM
Logic
1.215V
EA
CJ9112T6
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VFB
Block Diagram
3
Rev. - 1.0
Electrical Characteristics
ORDER INFORMATION
PART NUMBER
SHUTDOWN STATE
CJ9112T6A
True Load Disconnect
CJ9112T6B
Input to Output Bypass
PIN CONFIGURATION
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PIN NO.
PIN NAME
FUNCTION
1
SW
Switch Node, Boost Inductor Input Pin
2
GND
Ground Pin
3
V FB
Feedback Voltage Pin
4
EN
Enable Control Input Pin
5
V OUT
Output Voltage Pin
6
V IN
Input Voltage Pin
3
Rev. - 1.0
Electrical Characteristics
ABSOLUTE MAXIMUM RATINGS(1)
(Unless otherwise specified, TA=25°C)
PARAMETER
Input Voltage
SYMBOL
RATINGS
UNITS
VIN
-0.3~ 6
V
-0.3~ 6
V
-0.3~ 6
V
-0.3~6
V
1000
mA
(2)
(2)
SW Voltage
CE,FB Voltage
VOUT Voltage(2)
(2)
Ourput Current Bypass Mode
Power Dissipation SOT23-6L
PD
400
mW
Operating Virtual Ambient
Temperature Range
TA
-40~+85
℃
Storage Temperature Range
Tstg
-40~+125
℃
Lead Temperature
(Soldering, 10 sec)
Tsolder
260
℃
Human Body Model (HBM)
4000
V
Machine Model (MM)
400
V
ESD rating
(1) 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 under recommended operating conditions is not implied. Exposure to
absolute-maximum-rated conditions for extended periods my affect device reliability.
(2) All voltages are with respect to network ground terminal.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
MIN.
NOM.
MAX.
UNITS
Supply voltage at VIN
-0.3
-
6
V
Output voltage at VOUT
-0.3
-
6
V
Operating free air temperature range, TA
-40
-
85
℃
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5
Rev. - 1.0
Electrical Characteristics
ELETRICAL CHARACTERISTICS
VIN=1.5V, COUT=CIN=10μF, L=4.7μH, VOUT=3.3V, IOUT=0mA,Typical values are at TA=25℃,
unless otherwise specified.
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP. (1)
MAX.
UNITS
Minimum Start-Up
Voltage
ILOAD 1mA
VIN =
-
0.82
-
V
Minimum Operating
Voltage(2)
ILOAD 1mA
VIN =
-
0.65
-
V
Input Voltage Range
VIN
0.82
5.5
V
Feedback Voltage
VFB
1.179
1.215
1.251
V
Feedback Input
Bias Current
IVFB
-
10
-
nA
Output Voltage
Adjust Range(3)
VOUT
VOUT≥VIN
5.5
V
Output Voltage
VOUT
EN=0V
Maximum Output
Current
IOUT
VOUT Quiescent
Current(4)
IQOUT
VIN Sleep Current(5)
IQIN
No load Input
Current
IINO
Quiescent Current
Shutdown
IQSHDN
1.8
CJ9112T6A
0
CJ9112T6B
VIN-0.6V
V
VIN=1.2V,VOUT = 2V
200
-
VIN=2.4V,VOUT = 3.3V
400
-
VIN=3.3V,VOUT = 5.0V
IOUT=0mA, device is
not switching, EN=
VIN=4V, VOUT=5V
400
-
-
4
8
μA
IOUT=0mA, EN=VIN
-
1
2.3
μA
IOUT = 0mA, device
is switching
-
14
25
μA
VOUT = 3.3V
-
0.6
-
μA
mA
(1) Typical numbers are at 25°C and represent the most likely norm.
(2) Minimum VIN operation after start-up is only limited by the battery’s ability to provide the necessary
power as it enters a deeply discharged state.
(3) For VIN > VOUT, VOUT will not remain in regulation.
(4) IQOUT is measured at VOUT, VOUT is external supplied for VOUT > VIN (device is not switching)
(5) IQIN is measured at VIN pin during Sleep period, no load. Determined by characterization, not production tested.
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6
Rev. - 1.0
Electrical Characteristics
ELETRICAL CHARACTERISTICS
VIN=1.5V, COUT=CIN=10μF, L=4.7μH, VOUT=3.3V, IOUT=0mA,Typical values are at TA=25℃,
unless otherwise specified.
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP. (1)
MAX.
UNITS
NMOS Switch Leakage
INLK
VIN=VSW=5V, VOUT
=5.5V, EN=VFB=GND
-
0.15
-
μA
PMOS Switch Leakage
IPLK
VIN=VSW=GND,
VOUT=5.5V
-
0.15
-
μA
NMOS Switch
On Resistance
RDS(ON)N
VOUT = 3.3V,
ISW=100mA
-
0.25
-
Ω
PMOS Switch
On Resistance
RDS(ON)P
VOUT = 3.3V
ISW=100mA
-
0.5
-
Ω
NMOS Peak Switch
Current Limit(1)
IN(MAX)
-
1
-
A
VOUT Accuracy(2)
VOUT%
-3
-
+3
%
Switching Frequency
fSW
EN Input Logic High
EN Input Logic Low
EN Input Leakage
Current
Line Regulation
Load Regulation
20
% of VIN
-
5
-
nA
-0.4
0.3
0.4
%/V
-1.5
0.1
1.5
%
87
89
91
%
EN Low to High
90% of VOUT
-
1
-
ms
IOUT==20mA
VIN=1.4V
-
160
-
℃
-
20
-
℃
VEN=5V
IOUT=1mA
∆VOUT
1.5V≤VIN≤2.8V
VOUT ∆VIN IOUT=50mA
Soft Start Time(1)
tss
TSD
% of VIN
-
IENLK
∆VOUT
VOUT
KHz
-
70
-
IOUT=1mA
DCMAX
Die Temperature
Hysteresis
500
VIH
VIL
Maximum Duty Cycle(1)
Thermal Shutdown
Die Temperature
VIN=1.5V
25mA≤IOUT=≤100mA
VIN=1.5V
TSDHY
(1) Determined by characterization, not production tested.
(2) Includes Line and Load Regulation
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7
Rev. - 1.0
Typical Characteristics
TYPICAL APPLICATION CIRCUITS
L1
4.7μH
+
SINGLE
AA
CELL
C1
4.7μF
SW
VIN
CJ9112T6
OFF ON
VOUT
3.3V
100mA
VOUT
R1
1.72M
C2
10μF
VFB
EN
R2
1M
GND
Circuit 1
Use a Schottky diode if the
converter output voltage is
4.5V or greater.
L1
4.7μH
+
LITUIUM
CELL
C1
4.7μF
SW
CJ9112T6
OFF ON
VOUT
5.0V
250mA
VOUT
VIN
R1
3.1M
VFB
EN
GND
C2
10μF
R2
1M
Circuit 2
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8
Rev. - 1.0
Typical Characteristics
(TA=25℃, unless otherwise specified)
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9
Rev. - 1.0
SOT-23-6L Package Outline Dimensions
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
2.650
2.950
0.104
0.116
E1
1.500
1.700
0.059
0.067
e
0.037(BSC)
0.950(BSC)
e1
1.800
2.000
0.071
0.079
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
627/6XJJHVWHG3DG/D\RXW
NOTICE
JSCJ reserves the right to make modifications,enhancements,improvements,corrections or
other changes without further notice to any product herein. JSCJ does not assume any liability
arising out of the application or use of any product described herein.
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10
Rev. - 1.0