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Global Mixed-mode Technology Inc.
G9131
300mA Low-Dropout Linear Regulators
Features
90A Quiescent Current Guaranteed 300mA Output Current Dropout Voltage is 0.4V @ IO = 300mA Over-Temperature Protection and Short-Circuit Protection Stable With Low Cost Ceramic Capacitors Fixed Output Voltage :1.5V, 1.8V, 2.5V, 3.3V
General Description
The G9131 is a low supply current, low dropout linear regulator that comes in a space saving SOT-23 package. The supply current at no-load is 90A. An over temperature protection circuit is built-in in the G9131 to prevent thermal overload. These power saving features make the G9131 ideal for use in the battery-powered applications such as notebook computers, cellular phones, and PDA's.
Applications
Cordless Phones PDAs Hand-Held Devices Bar Code Scanners Electronic Scales
Ordering Information
ORDER NUMBER
G9131-15T73U G9131-18T73U G9131-25T73U G9131-33T73U G9131-33T24U
ORDER NUMBER (Pb free)
G9131-15T73Uf G9131-18T73Uf G9131-25T73Uf G9131-33T73Uf G9131-33T24Uf
MARKING
35xx 38xx 32xx 31xx 31xx
VOLTAGE
1.5V 1.8V 2.5V 3.3V 3.3V
TEMP. RANGE
-40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C
PACKAGE
SOT-23 SOT-23 SOT-23 SOT-23 SOT-89
* For other package types, pin options and package, please contact us at sales@gmt.com.tw
Order Number Identification
GXXXX XX XX X X Packing Type Pin Option Package Type Voltage Part Number PACKAGE TYPE
T2 : SOT-89 T7 : SOT-23 1 1 : VOUT 2 : VOUT 3 : GND 4 : GND 5 : VIN 6 : VIN
PIN OPTION
2 GND VIN VOUT VIN GND VOUT 3 VIN GND VIN VOUT VOUT GND
PACKING
U: Tape & Reel Direction
Package Type
3
Typical Application
OUTPUT VOLTAGE COUT 1F
Top View
Top View
VIN CIN
IN
G9131 OUT
GND
1
2
3
1
2
1F
SOT89
SOT23
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
(Note 1) Input Voltage.............................................................7V Power Dissipation Internally Limited (Note2) Maximum Junction Temperature.........................150C Storage Temperature Range.........-65C TJ +150C Reflow Temperature (soldering, 10sec) ...........260C Thermal Resistance Junction to Ambient, (JA) SOT-23(1) .......................................................276C/W SOT-89(1) ......................................... .............173C/W Thermal Resistance Junction to Case, (JC) SOT-89......................... ................................. .24C/W
Note (1): See Recommended Minimum Footprint.
G9131
Absolute Maximum Ratings
Operating Conditions
(Note 1) Input Voltage.......................... ...........................3V ~ 6V Temperature Range...........................-40C TA 85C
Electrical Characteristics
VIN =5V, IO = 300mA, CIN=1F, COUT =1F. All specifications apply for TA = TJ = 25C. [Note 3] PARAMETER
Output Voltage 5mA < IO < 300mA 4V < VIN < 6V, IO = 10mA 10mA < IO < 300mA VIN = 5V fi = 120 Hz, 1VP-P, Io = 100mA IO = 300mA VO=3.3V VO=2.5V VO=1.8V VO=1.5V
CONDITION
VO=3.3V VO=2.5V VO=1.8V VO=1.5V
MIN
3.234 2.45 1.764 1.455 -------------------------
TYP
3.3 2.5 1.8 1.5 15 10 90 45 0.4 0.5 0.8 0.9 0.65 0.8 145 25
MAX
3.366 2.55 1.845 1.545 ----150 -------------------
UNIT
V
Line Regulation Load Regulation Quiescent Current Ripple Rejection Dropout Voltage Short Circuit Current Current Limit Over Temperature Over Temperature Hysterics
mV mV A dB V A A C C
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics. Note2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal resistance, JA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is Tjmax-TA / JA. If this dissipation is exceeded, the die temperature will rise above 150C and IC will go into thermal shutdown. For the G9131 in SOT-23 package, JA is 276C/W and in the SOT-89 package is 173C/W (See Recommended Minimum Footprint). The safe operation in SOT-89 & SOT-23 package, it can see "Typical Performance Characteristics" (Safe Operating Area). Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Note4: The type of output capacitor should be tantalum, aluminum or ceramic.
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Definitions
Dropout Voltage The input/output Voltage differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 100mV below its nominal value, dropout voltage is affected by junction temperature, load current and minimum input supply requirements. Line Regulation The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected.
G9131
Load Regulation The change in output voltage for a change in load current at constant chip temperature. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. Maximum Power Dissipation The maximum total device dissipation for which the regulator will operate within specifications. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load.
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN = VO + 1V, CIN =1F, COUT =1F, TA = 25C, unless otherwise noted.)
Line Transient
G9131
Load Transient
Quiescent Current vs. Temperature
106 104
Quiescent Current (A)
Output Voltage vs. Temperature
3.4 3.38 3.36 3.34 IL=30mA
102 100 98 96 94 92 90 88 -25 V IN=5V V IN=6V
V OUT (V)
3.32 3.3 3.28 3.26 3.24 3.22
V IN=6V
V IN=5V
-5
15
35
55
75
3.2 -45
-25
-5
15
35
55
75
95
115
Temperature (C)
Temperature (C)
VIN vs. VOUT
3.37 3.35 3.33
VOUT (V)
Ripple Rejection vs. Frequency
60
T=25C, IL=30mA
Ripple Rejection (dB)
100mA 50 40 30 20 10 0 300mA
3.31 3.29 3.27 3.25 3.23 4 4.5 5 5.5 V IN (V) 6 6.5 7
600mA
10
100
1000
10000
100000
1000000
Frequency (Hz)
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continue)
Output Noise Start-Up
G9131
Dropout Volatge vs. Temperature
600 550 Dropout Voltage (mV) 500 450 400 350 300 250 200 -15 IL=300mA v o=3.3V
Output Current vs. Output Voltage
5
25
45
65
85
105
125
Temperature
SOT-89 Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25C ; Still Air
2.5 2.5
SOT-89 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area )
Unit:in2
A=0.5
Max. Dissipation Power (W)
Max. Dissipation Power (W)
2
2
A=1.0 A=1.5
1.5
1.5
A=2.0 A=2.5 A=3.0
1
1
A=3.5 A=4.0
0.5
0.5
A=4.5 A=5.0
0 0.5 1 1.5 2 2.5 3 3.5 4 PCB Top Copper Area (in2) 4.5 5
0 25 40 55 TAMB (C) 70 85
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Recommended Minimum Footprint
G9131
SOT-89
SOT-23
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Pin Description
NAME
IN GND OUT
G9131
FUNCTION
Regulator Input. Supply voltage can range from VIN(min) to +5.5V. Bypass with 1F to GND. This is ground pin. Regulator Output. Sources up to 300mA. Bypass with a 1F, 0.2 typical ESR capacitor to GND.
Detailed Description
The block diagram of the G9131 is shown in Figure 1. It consists of an error amplifier, 1.25V bandgap reference, PMOS output transistor, internal feedback voltage divider, over current protection circuit, and over temperature protection circuit. Over Current Protection The G9131 use a current sense-resistor to monitor the output current. A portion of the PMOS output transistor's current is mirrored to a resistor such that the voltage across this resistor is proportional to the output current. Once the output current exceeds limit threshold, G9131 would be protected with a limited output current. Further more, when the output is short to ground, the output current would be folded-back to a less limit. Over Temperature Protection To prevent abnormal temperature from occurring, the G9131 has a built-in temperature monitoring circuit.
When it detects the temperature is above 150C, the output transistor is turned off. When the IC is cooled down to below 135C, the output is turned on again. In this way, the G9131 will be protected against abnormal junction temperature during operation. Operating Region and Power Dissipation Since the G9131 is a linear regulator, its power dissipation is always given by P = IOUT (VIN - VOUT). The maximum power dissipation is given by: PD(MAX) = (TJ TA)/JA, Where (TJ - TA) is the temperature difference the G9131 die and the ambient air. For surface mount device, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. JA is the thermal resistance of the chosen package to the ambient air. In the case of a SOT-23 package, the thermal resistance is typically 275.5C/W. In SOT 89 RJA is 172.5C/W.
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Applications Information
Capacitor Selection and Regulator Stability Normally, use a 1F capacitor on the input and a 1F capacitor on the output of the G9131. Larger input capacitor values and lower ESR provide better supply-noise rejection and transient response. For stable operation over the full temperature range, with load currents up to 120mA, a minimum of 1F is recommended. Power-Supply Rejection and Operation from Sources Other than Batteries The G9131 is designed to deliver low dropout voltages and low quiescent currents in battery powered systems. Power-supply rejection is 47dB at low frequencies the output capacitor is the major contributor to the rejection of power-supply noise. When operating from sources other than batteries, improve supply-noise rejection and transient response by increasing the values of the input and output capacitors, and using passive filtering techniques.
G9131
Load Transient Considerations The G9131 load-transient response graphs show two components of the output response: a DC shift of the output voltage due to the different load currents, and the transient response. Typical overshoot for step changes in the load current from 0mA to 300mA is 10mV. Increasing the output capacitor's value and decreasing its ESR attenuates transient spikes. Input-Output (Dropout) Voltage A regulator's minimum input-output voltage differential (or dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this will determine the useful end-of-life battery voltage. Because the G9131 use a P-channel MOSFET pass transistor, their dropout voltage is a function of RDS(ON) multiplied by the load current.
IN
ERROR AMP OVER CURRENT PROTECT & DYNAMIC FEEDBACK
P OUT
R1
OVER TEMP. PROTECT 1.25V Vref
R2 GND
Figure 1. Functional Diagram
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Package Information
G9131
D D1 POLISH
E HE A1 e C
MATTE FINISH
A
b
b1
b
POLISH
SOT-89 (T2) Package
SYMBOL
A A1 b b1 C D D1 HE E e
DIMENSION IN MILLIMETER MIN NOM MAX
1.40 0.80 0.36 0.41 038 4.40 1.40 ----2.40 2.90 1.50 1.04 0.42 0.47 0.40 4.50 1.60 ----2.50 3.00 1.60 ----0.48 0.53 0.43 4.60 1.75 4.25 2.60 3.10
MIN
0.055 0.031 0.014 0.016 0.014 0.173 0.055 ----0.094 0.114
DIMENSION IN INCH NOM
0.059 0.041 0.016 0.018 0.015 0.177 0.062 ----0.098 0.118
MAX
0.063 ----0.018 0.020 0.017 0.181 0.069 0.167 0.102 0.122
Ver: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
C
D
G9131
L
E
H
e
1
A A2 A1 b
SOT-23 (T7) 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 MILLIMETER 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
Taping Specification
PACKAGE
SOT-23 SOT-89
Feed Direction SOT-89 Package Orientation Feed Direction SOT-23 Package Orientation
Q'TY/BY REEL
3,000 ea 1,000 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: 1.6 Dec 22, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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