GMT G5103T11U Datasheet
Global Mixed-mode Technology Inc.
G5103
Micro-power Step-Up DC/DC Converters in SOT23-5
Features
Configurable Output Voltage Up to 16V
20µA Quiescent Current
<1µA Shutdown Current
<1µA Shutdown Pin Current
Supply Range from 2.5V to 6.5V
Low V
Tiny SOT23-5 Package
: 250mV (ISW=300mA)
DS(on)
Applications
STN/TFT LCD Bias
Personal Digital Assistants (PDAs)
Handheld Computers
Digital Still Cameras
Cellular Phones
WebPad
White LED Driver
Local 3V to 5V Conversion
General Description
The G5103 boost converter is designed for small/ medium size LCD panel of high bias voltage.
Due to a typical 20µA quiescent current and 2.5V~
6.5V supply voltage range, it is suitable for battery
powered portable applications. Such as PDAs and
Handheld Computers. When the IC sets to shutdown
mode, it only consumes less than 1µA.
Furthermore, the 350mA current limit, 500ns fixed
minimum off-time and tiny SOT23-5 package facilitates the use of smaller inductor and other surface-mount components to minimize the PCB size in
those space-conscious applications.
To control the IC, no other external current is needed
for the shutdown pin. It typically consumes less than
1µA of full supply range.
Ordering Information
PART
G5103T11U -40°C ~ +85°C SOT23-5 5103x
TEMP.
RANGE
PIN-
PACKAGE
Pin Configuration Typical Application Circuit
TOP
MARK
10µH
SW
SW
GND
GND
FB
FB
1
1
2
2
3
3
G5103
G5103
G963
G963
SOT23-5
SOT23-5
V
V
IN
IN
2.5V to 4.2V
2.5V to 4.2V
5
5
VCC
VCC
4
4
SHDN
SHDN
4.7µF
4.7µF
VCC
VCC
G5103
G5103
SHDN
SHDN
10µH
GND
GND
SW
SW
FB
FB
1M
1M
80.6k
80.6k
1µF
1µF
16V
16V
12mA
12mA
Ver: 1.0
Jan 13, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
G5103
Absolute Maximum Ratings
SW to GND…………………………………..-0.3V to +18V
FB to GND…………… ………………………..-0.3V to V
VCC,
SHDN
GND.............................….....-0.3V to +7V
to
Junction Temperature ......….......….........….........+125°C
Storage Temperature…………........….. –65°C to +150°C
CC
Lead Temperature (Soldering, 10 sec).…………..+300°C
Operating Temperature Range (Note 1) ..-40°C to +85°C
Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device.
Electrical Characteristics
SHDN
V
(VCC = 3.6V,
= 3.6V, TA =
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range 2.5 6.5 V
Quiescent Current
FB Comparator Trip Point 1.18 1.2 1.22 V
Output Voltage Line Regulation 2.5V<VIN<6.5V -0.05 %/V
FB Pin Bias Current (Note 2) VFB = 1.2V 30 80 nA
Switch Off Time
Switch V
Switch Current Limit 300 350 400 mA
SHDN
SHDN
SHDN
Switch Leakage Current Switch Off, VSW = 16V 0.01 5 µA
I
DS(ON)
Pin Current
Input Voltage High
Input Voltage Low
25°C
)
Not Switching 20 30 µA
= 0V
V
SHDN
V
> 1V 500 ns
FB
V
< 0.6V 1.6 µs
FB
= 300mA 250 350 mV
SW
0.1 1 µA
0.1 1 µA
0.9 V
0.25 V
Note 1: The G5103 are guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the
-40°C to 85°C operating temperature range are assured by design, characterization and correlation with
statistical process controls.
Note 2: Bias current flows into the FB pin.
Block Diagram
L1
V
V
IN
IN
VOUT
VOUT
R1
R1
R2
R2
C1
C1
FB
FB
1.2V
1.2V
BIAS
BIAS
+
+
VCC
VCC
ERROR
ERROR
COMP
COMP
VREF
VREF
SHDN
SHDN
SHUTDOWN
SHUTDOWN
LOGIC
LOGIC
en_sw
en_sw
OC
OC
COMP
COMP
+
+
L1
PUMP CONTROL
PUMP CONTROL
T
T
PULSE
PULSE
OFF
OFF
CONTROL
CONTROL
DRIVER
DRIVER
SW
SW
C2
C2
V
V
OUT
OUT
Ver: 1.0
Jan 13, 2003
GND
GND
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VCC=+3.6V, V
SHDN
=+3.6V, L=10µH, TA=25°C, unless otherwise noted.)
G5103
Efficiency vs. Load Current
90
80
70
60
50
Efficiency (%)
40
30
0.1 1 10 100
VIN=4.2V
VIN=2.7V
VOUT=16V
Load Current (mA)
Vds_on vs. Temperature
500
400
VIN=2.7V
300
VIN=3.6V
Output Voltage vs. Load Current
17
16.5
16
15.5
Output Voltage (V)
15
VIN=2.7V
VIN=4.2V
12345678910
Load Current (mA)
Quiescent Current vs. Temperature
50
40
30
VIN=4.2V
200
Switch Vds_on (mV)
100
-20 0 20 40 60 80 100
VIN=4.2V
Temperature (°C)
20
Quiescent Current (µA)
10
-20 0 20 40 60 80 100
VIN=2.7V
Temperature (°C)
Ver: 1.0
Jan 13, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
3
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