G961 Global Mixed-mode Technology Inc. 1A Low Dropout Regulator with Enable Features General Description The G961 is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage at up to 1 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards or 1.5V, 1.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. An enable pin further reduces power dissipation while shut down. The G961 provides excellent regulation over variations in line, load and temperature. Adjustable Output from 1.2V to 4.8V Using External Resistors 1.5V, 1.8V and 2.5V Options by Setting ADJ Pin Below 0.2V Over current and over temperature protection 400mV dropout @1A Enable pin 10µA quiescent current in shutdown SOT-89-5 Package Applications The SOT-89-5 is available with 1.5V, 1.8V and 2.5V internally preset outputs that are also adjustable using external resistors. Battery powered systems Motherboards Peripheral cards Network cards Set Top Boxes Medical Equipment Notebook Computers Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) MARKING TEMP. RANGE PACKAGE G961-15ADJTEU G961-15ADJTEUf 961-15 -40°C ~ +85°C SOT-89-5 G961-18ADJTEU G961-25ADJTEU G961-18ADJTEUf G961-25ADJTEUf 961-18 961-25 -40°C ~ +85°C -40°C ~ +85°C SOT-89-5 SOT-89-5 Note: TE: SOT-89-5 U : Tape & Reel e.g. 18 denotes the 1.8V output voltage. Pin Configuration Typical Application Circuit IENH R3 G961 VIN 5 G961 VEN VEN VEN VIN VIN 4 VO VO R1 C1 22µF GND ADJ C2 47µF R2 1 2 3 ADJ GND VO SOT-89-5 1.2 (R1+R2) Volts R2 R2=12kΩ is recommended VO = R3 should be connected for current IENH restriction as VEN > VIN+0.3V TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Apr 01, 2005 1 G961 Global Mixed-mode Technology Inc. Absolute Maximum Ratings (Note 1) Input Voltage……………………………………………..7V VEN Voltage…………..…………………………..VIN+0.3V Power Dissipation Internally Limited (Note 2) 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-89-5………………………….…………..…128°C/W Thermal Resistance Junction to Case, (θJc) SOT-89-5……………………………….…………19°C/W ESD Rating (Human Body Model)…………..………2kV Operation Conditions (Note 1) Input Voltage………………………………….2.2V ~5.5V Temperature Range………….………-40°C ≤TA ≤ +85°C Electrical Characteristics VEN=VIN, VIN =5V, IO = 0.5A, CIN = 4.7µF, COUT =10µF, TA = TJ = 25°C unless otherwise specified (Note 3) PARAMETER SYMBOL Supply Voltage VIN Output Voltage VO Line Regulation Load Regulation Quiescent Current IQ Ripple Rejection Dropout Voltage Short Circuit Current Over Temperature VD CONDITION MIN TYP MAX 2.2 --- 5.5 UNIT V VIN=VO +0.7V, IO=10mA -2 VO 2 % VO+0.7V < VIN < 5.5V, IO=10mA 10mA < IO < 1A VIN=3.3V,VEN=VIN ------- 0.2 0.8 1.7 2 2 2.5 % % mA VIN=3.3V,VEN=0V fi=120Hz, 1VP-P, IO=100mA ----- 16 55 35 --- µA dB IO=1A ------- 0.4 0.8 150 0.6 ----- V A °C VEN Voltage High VENH Output Active 1.6 --- --- V VEN Voltage Low VEN Bias Current Low VENL IENL Output Disabled VEN=0.4V ----- ----- 0.4 20 V µA ADJ Reference Voltage ADJ Pin Threshold VREF VIN=2.2V, VADJ=VOUT, IO=10mA 1.188 --- 1.2 0.2 1.212 --- V V 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. 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 or aluminum. Definitions 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. 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 2% below its nominal value, dropout voltage is affected by junction temperature, load current and minimum input supply requirements. 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: 1.2 Apr 01, 2005 2 G961 Global Mixed-mode Technology Inc. Typical Performance Characteristics VEN=VIN, VIN =5V, IO = 0.5A, CIN = 4.7µF, COUT =10µF, TA = TJ = 25°C (VOUT=1.8V) Line Transient Response Load Transient Response Short Circuit Current Ripple Rejection 60 IL=10mA Ripple Rejection (dB) 50 IL=1A 40 IL=500mA 30 20 VIN=4V COUT=10µF Vripple=224mV 10 0 10 100 1000 10000 100000 1000000 Frequency (Hz) Overcurrent Protection Characteristics Start-up TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Apr 01, 2005 3 G961 Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) Quiescent Current vs. Temperature Dropout Voltage vs. IL 700 2.00 600 1.90 1.85 Dropout Voltage (mV) Quiescent Current (mA) 1.95 VIN=5.0V 1.80 1.75 VIN=3.0V 1.70 1.65 1.60 500 400 T=85°C T=25°C 300 200 T=-25°C 100 1.55 0 1.50 -25 -15 -5 5 0 15 25 35 45 55 65 75 85 200 400 600 IL (mA) Temperature (°C) 1000 Output Voltage vs. VIN Output Voltage vs. Temperature 1.824 1.825 1.819 IL=10mA 1.82 1.814 Output Voltage (V) Output Voltage (V) 800 VIN=5.0V 1.809 1.804 VIN=3.0V 1.799 1.794 T=85°C 1.815 T=25°C 1.81 1.805 1.789 T=-25°C 1.8 1.784 -25 -15 -5 5 2.5 15 25 35 45 55 65 75 85 Temperature (°C) 3.5 4.5 5.5 VIN (V) 6.5 SOT-89-5 Max. Power Dissipation vs. TAMB (still air) ( Different PCB Top Copper Area ) SOT-89-5 Max. Power Dissipation vs. PCB Top Copper Area TAMB = 25°C ; Still Air 3 2.5 Unit:in2 Max. Dissipation Power (W) Max. Dissipation Power (W) A=0.5 2 1.5 1 0.5 0 2.5 A=1.0 A=1.5 2 A=2.0 A=2.5 1.5 A=3.0 1 A=3.5 A=4.0 0.5 A=4.5 A=5.0 0 0.5 1.5 2.5 3.5 4.5 25 45 65 85 TAMB (°C) PCB Top Copper Area (in2) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Apr 01, 2005 4 Global Mixed-mode Technology Inc. G961 Recommended Minimum Footprint SOT-89-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.2 Apr 01, 2005 5 G961 Global Mixed-mode Technology Inc. Package Information A C D F E L B I K H J G SOT-89-5 Package DIMENSION IN MM MIN MAX DIMENSION IN INCH MIN MAX A B 4.40 4.05 4.60 4.25 0.173 0.159 0.181 0.167 C D 1.50 1.30 1.70 1.50 0.059 0.051 0.067 0.059 E F 2.40 0.80 2.60 ----- 0.094 0.031 0.102 ----- SYMBOL G H I J K L 3.00 REF 1.50 REF 0.40 1.40 0.35 0.118 REF 0.059 REF 0.52 1.60 0.41 0.016 0.055 0.014 5º TYP 0.020 0.063 0.016 5º TYP Taping Specification PACKAGE Q’TY/REEL SOT-89-5 1,000 ea Feed Direction SOT-89-5 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: 1.2 Apr 01, 2005 6