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Global Mixed-mode Technology Inc.
G5910
High-Efficiency White LED Charge Pump
Features
Input Range2.7V to 5V Quiescent Current: 90A Regulated 5V 4% output 5V Output Current 90mA with VIN 3.0V 40mA with VIN 2.7V High Frequency 1MHz operation Shutdown mode draws less than 1A Shot-circuit/over-temperature protection SOT-23-6 and TSOT-23-6 package
General Description
The G5910 Charge-Pump is a switched-capacitor voltage converter that delivers a regulated output. The external inductor is not required for operation. Using small capacitors, the G5910 can deliver up to 90mA (@VIN=3V) to the voltage-regulated output. The G5910 features high efficiency over a large portion of its load range making this device ideal for battery-powered applications. The combination of few external components and small package size keeps the total converter board area to a minimum in space-restricted applications. The G5910 contains a thermal management circuit to protect the device under continuous output short circuit conditions. The G5910 is available in a surface mount SOT-23-6 and TSOT-23-6 package.
Applications
Portable Communication Devices Cellular Phones PDA Handheld Electronics Digital Cameras LED/Display Back Light Driver LED for Camera Flash
Ordering Information
ORDER NUMBER
G5910-45TBU G5910-50TBU G5910-45TPU G5910-50TPU Note: TB : SOT-23-6 TP:TSOT-23-6 U: Tape & Reel
MARKING
5911x 5910x 5911x 5910x
TEMP. RANGE
-40C to 85C -40C to 85C -40C to 85C -40C to 85C
PACKAGE (Pb free)
SOT-23-6 SOT-23-6 TSOT-23-6 TSOT-23-6
Pin Configuration
Typical Application Circuit
G5910
VOUT 1 6 C+
VOUT COUT 10F
VOUT
C+ CFLY 1F CIN C10F
GND
VIN
GND 2
5 VIN ON/OFF
G5910
VIN
SHDN
SHDN
3
4
CCIN, COUT: TAIYO YUDEN, JMK212BJ106KG CFLY: TAIYO YUDEN,EMK212JB105KG
SOT -23-6TSOT-23-6
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V VOUT to GND. . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 6V SHDN to GND . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V CP- to GND . . . . . . . . . . . . . . . . . . . .-0.3V to VIN+0.3V Output to GND Short-Circuit Duration.........Indefinites
G5910
Operating Temperature Range . . . . . .. .-40C to 85C Junction Temperature. . . . . . . . . . . . . . . . . . . . .150C ESD Rating1 HBM . . . . . . . . . . . . . . . . . . . . . . .2000V Reflow Temperature (soldering, 10sec) . . . . . . .260C
Note 1Human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
Electrical Characteristics
VCC=V SHDN = 3V, TA=25C, CFLY=1F, CIN=10F, COUT=10F, unless otherwise noted.
DESCRIPTION
Input Voltage No Switching supply Current
SYMBOL
VIN IQ
CONDITION
VOUT=5.0V 2.7VVIN5V, IOUT=0mA, SHDN=VIN,VOUT=5.5V 2.7VVIN5V, IOUT 40mA G5910-50 3.0VVIN5V, IOUT 90mA 2.7VVIN5V, IOUT 50mA G5910-45 3.0VVIN5V, IOUT 100mA 2.7VVIN5V, IOUT=0mA, V SHDN = 0 VIN = 3V, IOUT = 50mA VIN = 3V, IOUT = 90mA VIN = 2.7V, IOUT = 40mA VIN = 3V, IOUT = 90mA Oscillator Free Running
MIN TYP MAX UNIT
2.7 --4.8 4.32 ----------0.7 1.4 ----90 5 4.5 --25 20 88 80 1 ----0.22 340 150 30 VOUT 140 5.2 4.68 1 --------1.3 --0.3 --------V A mVP-P % MHz V V ms mA C C V A
Output Voltage
VOUT
Shutdown Supply Current Ripple Voltage Efficiency Frequency
SHDN Input Threshold High
SHDN Input Threshold Low
ISHDN VRIPPLE FOSC VIH VIL tON ISC TSD
VOUT Turn-on time Short-circuit current Thermal Shutdown Temperature Thermal Shutdown Hysteresis
VIN = 3V, IOUT = 0mA VIN = 3V, VOUT = GND, SHDN = 3V
---------
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN=3V, CIN=COUT=10F, CFLY=1F, TA=25C, unless otherwise noted.)
G5910
Startup Time with 90mA Load
Startup Time with 50mA Load
Output Ripple with IOUT=50mA
Output Ripple with IOUT=90mA
Load Transient for 50mA
Load Transient for 90mA
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Output Voltage vs Output Current
5.2 5.15 5.1 Output Voltage (V) Output Voltage (V) 5.05 5 4.95 4.9 4.85 4.8 0 10 20 30 40 50 60 70 80 90 Output Current (mA) VIN=2.7V VIN=3.6V 5.2 5.15 5.1 5.05 5 4.95 4.9 VIN=3.0V 4.85 4.8 2.5 3 TA=-40C TA=25C TA=100C
G5910
Output Voltage vs Supply Voltage
IOUT=20mA 3.5 4 Supply Voltage (V) 4.5 5
Output Voltage vs Temperature
5.2 5.15 Supply Current (A) 5.1 Output Voltage (V) 5.05 5 4.95 4.9 4.85 4.8 -40 -20 0 20 40 60 Temperature (C) 80 100 VIN=3V IOUT=50mA 100 90 80 70 60 50 40 30 20 10 0 2.5
Supply Current vs Supply Voltage
TA=100C
TA=25C TA=-40C
IOUT=0A VIN=VSHDN
3
3.5
4
4.5
5
Supply Voltage (V)
Supply Current vs Temperature
100 90 80 Supply Current (A) 70 60 50 40 30 20 10 0 -40 -20 0 20 40 60 80 100 Temperature (C) IOUT=0A VIN=VSHDN=3V Supply Current (A) 100 90 80 70 60 50 40 30 20 10 0 0
Supply Current vs SHDN Voltage
VIN=5V
VIN=3V
VIN=4V
IOUT=0A
1
2
3
4
5
SHDN Voltage (V)
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Frequency vs Supply Voltage
1200 1150 1100 Frequency (KHz) TA=25C Frequency (KHz) 1050 1000 950 900 850 800 750 700 2.5 3 3.5 4 4.5 5 Supply Voltage (V) TA=-40C TA=100C 1200 1150 1100 1050 1000 950 900 850 800 750 700 -40 -20 0 20 40
G5910
Frequency vs. Temperature
60
80
100
Temperature (C)
VIH vs Supply Voltage
1.4 1.2 1 VIH (V) VIL (V) 0.8 0.6 0.4 0.2 0 2.5 3 3.5 4 4.5 5 Supply Voltage (V) TA=100C TA=25C TA=-40C 1.4 1.2 1 0.8 0.6 0.4 0.2 0 2.5 3
VIL vs Supply Voltage
TA=-40C
TA=100C
TA=25C
3.5 4 Supply Voltage (V)
4.5
5
Efficiency vs Input Volatge
90 85 80 Efficiency (%) 75 70 65 60 55 50 2.5 3 3.5 4 Input Voltage (V) 4.5 5 40mA Efficiency (%) 90mA 25mA 100 90 80 70 60 50 40 30 20 10 0 0.01
Efficiency vs Load Current
VIN=2.7V VIN=3.0V
VIN=3.6V
VIN=3.3V
0.1
1 10 Load Current (mA)
100
1000
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Output Voltage vs. Supply Voltage
6 5 Output Voltage (V) 4 3 2 1 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Supply Voltage (V) IOUT =2mA
G5910
Recommended Minimum Footprint
SOT-23-6TSOT-23-6
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Pin Descriptions
PIN
1 2 3 4 5 6
G5910
NAME
VOUT GND
SHDN
FUNCTION
Regulated output pin. Bypass this pin to ground with at least 6.8F low ESR capacitor Ground connection Shutdown input. Active low signal disables the converter. Flying capacitor negative terminal Input supply pin. Bypass this pin to ground with at least 6.8F low ESR capacitor Flying capacitor positive terminal
CVIN C+
Detailed Description
The G5910 uses a switched capacitor charge pump to boost an input voltage to a regulated output voltage. Through an internal resistor divider network the output regulation is achieved by sensing the charge pump output voltage. When the divided output drops below a preset trip point that controlled by an internal comparator a switched doubling circuit is enabled. The charge pump switch cycling enables four internal switches at two non-overlapping phases. During the first phase, switches S1 and S4 are switched on (short) and switch S2 and S3 are off (open). The flying capacitor CFLY is charged to a level approximately equal to input voltage VIN. On the second phase, switches S1 and S4 are turned off (open), S2 and S3 are turned on (short). During the first phase the low side of the flying capacitor CFLY is connected to GND. During the second phase, the flying capacitor CFLY is switched so that the low side is connected to VIN. The voltage at the high side of the flying capacitor CFLY is bootstrapped to 2 x VIN and is connected to output through a switch. For each cycle phase, charge from input node VIN is transported from a lower voltage to a higher voltage. This cycle repeats itself until the output node voltage is high
enough to exceed the preset input threshold of the control comparator. When the output voltage exceeds the internal trip point voltage level, the switching cycle stops and the charge pump circuit is placed in an idle state. The closed loop feed back system containing the voltage sense circuit and control comparator allows the G5910 to provide a regulated output voltage and output load current. An integrated oscillator within the control circuit block creates the switching signal that drives the charge pump. The free running charge pump switching frequency is approximately 1MHz. The G5910 has complete output short circuit and thermal protection to safeguard the device under extreme operating conditions. When output voltage is short to ground, the switches S1, S4, and S3 are turned on with limited current of 220mA. After the short circuit condition has been released and output voltage rises above a threshold voltage, the G5910 will go into normal operation mode. An internal thermal protection circuit senses die temperature and will shut down the device if the internal junction temperature exceeds approximately 150C. The charge pump will remain disabling until the fault condition is relieved.
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Block Diagram
GND
G5910
VIN
SHDN
S4 Shutdown
S1 C+ C-
Oscillator S2 Bandgap S3
Bias
Control
VIN
UV
VOUT
Layout Considerations
High charge pump switching frequencies and large peak transient currents mandate careful printed circuit board layout. As a general rule for charge pump boost converters, all external capacitors should be located as close as possible to the device package with minimum length trace connections. Maximize the ground plane around the G5910 charge pump and make sure all external capacitors are connected to the immediate ground plane. A local component side ground plane is recommended. If this is not possible due the layout design limitations, assure good ground connections by the use of large or multiple pcb via's. Refer to the following G5910 evaluation board for an example of good charge pump layout design.
Topover layer
Top layer
Bottom layer
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Package Information
D C L
G5910
E
H
e1 e
1
A2 b
A A1
SOT-23-6 (TB) Package
Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance 0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane
SYMBOL
A A1 A2 b C D E e H L 1
MIN.
1.00 0.00 0.70 0.35 0.10 2.70 1.40 ----2.60 0.37 1
DIMENSION IN MM NOM.
1.10 ----0.80 0.40 0.15 2.90 1.60 1.90(TYP) 2.80 -----5
MAX.
1.30 0.10 0.90 0.50 0.25 3.10 1.80 ----3.00 ----9
MIN.
0.039 0.000 0.028 0.014 0.004 0.106 0.055 ----0.102 0.015 1
DIMENSION IN INCH NOM.
0.043 ----0.031 0.016 0.006 0.114 0.063 0.075(TYP) 0.110 ----5
MAX.
0.051 0.004 0.035 0.020 0.010 0.122 0.071 ----0.118 ----9
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
D C L
G5910
E1 E
e e1
1
A2 y A1
A b
TSOT-23-6 (TP) Package
Note: 1. Dimension D does not include mold flash, protrusions or tate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.1mm PER end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed 0.15mm PER side. 2. The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but including any mismatch between the top and bottom of the plastic body.
SYMBOL
A A1 A2 b C D E E1 e e1 L y 1
MIN.
0.75 0.00 0.70 0.35 0.10 2.80 2.60 1.50
DIMENSION IN MM NOM.
--------0.75 --------2.90 2.80 1.60 0.95 BSC 1.90 BSC -------------
MAX.
0.90 0.10 0.80 0.51 0.25 3.00 3.00 1.70
MIN.
0.030 0.000 0.028 0.014 0.004 0.110 0.102 0.059
DIMENSION IN INCH NOM.
--------0.030 --------0.114 0.110 0.063 0.0374 BSC 0.0748 BSC -------------
MAX.
0.035 0.004 0.031 0.020 0.010 0.118 0.118 0.067
0.37 ----0
----0.10 8
0.015 0
----0.004 8
Taping Specification
PACKAGE
SOT-23-6 TSOT-23-6
Feed Direction SOT- 23-6TSOT-23-6 Package Orientation
Q'TY/REEL
3,000 ea 3,000 ea
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
Ver: 1.4 May 19, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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