G9131 Global Mixed-mode Technology Inc. 300mA Low-Dropout Linear Regulators Features 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 90µA. 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. 90µA 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 Applications Cordless Phones PDAs Hand-Held Devices Bar Code Scanners Electronic Scales Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING VOLTAGE TEMP. RANGE PACKAGE G9131-15T73U G9131-18T73U G9131-25T73U G9131-33T73U G9131-33T24U G9131-15T73Uf G9131-18T73Uf G9131-25T73Uf G9131-33T73Uf G9131-33T24Uf 35xx 38xx 32xx 31xx 31xx 1.5V 1.8V 2.5V 3.3V 3.3V -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C SOT-23 SOT-23 SOT-23 SOT-23 SOT-89 * For other package types, pin options and package, please contact us at [email protected] Order Number Identification GXXXX XX XX X X Packing Type Pin Option Package Type Voltage Part Number PIN OPTION PACKAGE TYPE 1 1 : VOUT 2 : VOUT 3 : GND 4 : GND 5 : VIN 6 : VIN T2 : SOT-89 T7 : SOT-23 2 GND VIN VOUT VIN GND VOUT PACKING 3 VIN GND VIN VOUT VOUT GND Package Type U: Tape & Reel Direction Typical Application 3 Top View CIN 1 2 SOT89 3 1 IN VIN Top View 1µF 2 ＋ OUTPUT VOLTAGE G9131 OUT GND ＋ COUT 1µF SOT23 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 1 G9131 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Operating Conditions (Note 1) Input Voltage.............................................................7V Power Dissipation Internally Limited (Note2) Maximum Junction Temperature.........................150°C Storage Temperature Range.........-65°C ≤ TJ ≤+150°C Reflow Temperature (soldering, 10sec) ...........260°C Thermal Resistance Junction to Ambient, (θJA) SOT-23(1) .......................................................276°C/W SOT-89(1) ......................................... .............173°C/W Thermal Resistance Junction to Case, (θJC) SOT-89......................... ................................. .24°C/W (Note 1) Input Voltage.......................... ...........................3V ~ 6V Temperature Range...........................-40°C ≤ TA ≤85°C Note (1): See Recommended Minimum Footprint. Electrical Characteristics VIN =5V, IO = 300mA, CIN=1µF, COUT =1µF. All specifications apply for TA = TJ = 25°C. [Note 3] PARAMETER CONDITION Output Voltage 5mA < IO < 300mA Line Regulation Load Regulation Quiescent Current Ripple Rejection 4V < VIN < 6V, IO = 10mA 10mA < IO < 300mA VIN = 5V fi = 120 Hz, 1VP-P, Io = 100mA Dropout Voltage IO = 300mA VO=3.3V VO=2.5V VO=1.8V VO=1.5V VO=3.3V VO=2.5V VO=1.8V VO=1.5V Short Circuit Current Current Limit Over Temperature Over Temperature Hysterics MIN TYP MAX 3.234 2.45 1.764 1.455 ------------------------- 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 3.366 2.55 1.845 1.545 ----150 ------------------- UNIT V mV mV µA 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, θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is Tjmax-TA / θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. For the G9131 in SOT-23 package, θJA is 276°C/W and in the SOT-89 package is 173°C/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. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 2 Global Mixed-mode Technology Inc. G9131 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. 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. 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. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 3 G9131 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN = VO + 1V, CIN =1µF, COUT =1µF, TA = 25°C, unless otherwise noted.) Line Transient Load Transient Output Voltage vs. Temperature 3.4 104 3.38 102 3.36 IL=30mA 3.34 100 V OUT (V) Quiescent Current (µA) Quiescent Current vs. Temperature 106 V IN=6V 98 96 94 3.32 V IN=6V 3.3 3.28 V IN=5V 3.26 92 3.24 V IN=5V 90 3.22 88 -25 -5 15 35 55 3.2 -45 75 -25 -5 15 Temperature (°C) 55 75 95 115 Temperature (°C) Ripple Rejection vs. Frequency VIN vs. VOUT 60 3.37 100mA T=25°C, IL=30mA 50 Ripple Rejection (dB) 3.35 3.33 VOUT (V) 35 3.31 3.29 3.27 300mA 40 30 600mA 20 10 3.25 0 3.23 4 4.5 5 5.5 6 6.5 10 7 100 1000 10000 100000 1000000 Frequency (Hz) V IN (V) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 4 G9131 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continue) Output Noise Start-Up Output Current vs. Output Voltage Dropout Volatge vs. Temperature 600 Dropout Voltage (mV) 550 IL=300mA v o=3.3V 500 450 400 350 300 250 200 -15 5 25 45 65 85 105 125 Temperature SOT-89 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) SOT-89 Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air Unit:in2 2.5 2.5 2 2 Max. Dissipation Power (W) Max. Dissipation Power (W) A=0.5 1.5 1 0.5 A=1.0 A=1.5 A=2.0 1.5 A=2.5 A=3.0 1 A=3.5 A=4.0 0.5 A=4.5 A=5.0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 PCB Top Copper Area (in2) 4.5 5 25 40 55 TAMB (°C) 70 85 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 5 G9131 Global Mixed-mode Technology Inc. Recommended Minimum Footprint SOT-23 SOT-89 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 6 Global Mixed-mode Technology Inc. G9131 Pin Description NAME IN GND OUT FUNCTION Regulator Input. Supply voltage can range from VIN(min) to +5.5V. Bypass with 1µF to GND. This is ground pin. Regulator Output. Sources up to 300mA. Bypass with a 1µF, ＜0.2Ω typical ESR capacitor to GND. Detailed Description When it detects the temperature is above 150°C, the output transistor is turned off. When the IC is cooled down to below 135°C, the output is turned on again. In this way, the G9131 will be protected against abnormal junction temperature during operation. 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. 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)/θJA, 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. θJA 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 275.5°C/W. In SOT 89 RθJA is 172.5°C/W. 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. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 7 Global Mixed-mode Technology Inc. G9131 Applications Information Capacitor Selection and Regulator Stability Normally, use a 1µF capacitor on the input and a 1µF 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 1µF is recommended. 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. 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. 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 － OVER CURRENT PROTECT & DYNAMIC FEEDBACK ERROR AMP ＋ P OUT R1 OVER TEMP. PROTECT 1.25V Vref R2 GND Figure 1. Functional Diagram TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 8 G9131 Global Mixed-mode Technology Inc. Package Information D D1 POLISH E HE A1 e C MATTE FINISH A b b1 b POLISH SOT-89 (T2) Package DIMENSION IN MILLIMETER MIN NOM MAX MIN DIMENSION IN INCH NOM MAX A 1.40 1.50 1.60 0.055 0.059 0.063 A1 b 0.80 0.36 1.04 0.42 ----0.48 0.031 0.014 0.041 0.016 ----0.018 b1 C 0.41 038 0.47 0.40 0.53 0.43 0.016 0.014 0.018 0.015 0.020 0.017 D D1 HE E e 4.40 1.40 ----2.40 2.90 4.50 1.60 ----2.50 3.00 4.60 1.75 4.25 2.60 3.10 0.173 0.055 ----0.094 0.114 0.177 0.062 ----0.098 0.118 0.181 0.069 0.167 0.102 0.122 SYMBOL TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 9 G9131 Global Mixed-mode Technology Inc. C D L E H e θ1 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 MIN DIMENSION IN MILLIMETER NOM MAX A 1.00 1.10 1.30 A1 A2 0.00 0.70 ----0.80 0.10 0.90 b C D E e H 0.35 0.10 2.70 1.40 ----2.60 0.40 0.15 2.90 1.60 1.90(TYP) 2.80 0.50 0.25 3.10 1.80 ----3.00 L θ1 0.37 ------ ----- 1° 5° 9° Taping Specification PACKAGE SOT-23 SOT-89 Feed Direction SOT-89 Package Orientation Q'TY/BY REEL 3,000 ea 1,000 ea Feed Direction SOT-23 Package Orientation 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. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.6 Dec 22, 2005 10