G958 Global Mixed-mode Technology Inc. 800mA Adjustable Low-Dropout Linear Regulator Features General Description The G958 is a low dropout linear regulator with a dropout of 1.2V at 500mA of load current. It is available in an adjustable version, which can set the output from 1.25V to 5V with only two external resistors. Available in Adjust Version Space Saving SOT-89 Package Internal Short Circuit Current Limiting Internal Over Temperature Protection Current limit in Excess of 800mA The G958 provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. Applications Post Regulation for Switching DC/DC Converter Voltage Regulator for CD-ROM Driver Voltage Regulator for LAN Card Battery Powered Instrumentation The G958 is available in SOT-89 packages. A minimum of 10µF tantalum electrolytic capacitor is required at the output to improve the transient response and stability. Motherboard Ordering Information ORDER NUMBER 958 3xx 958 4xx G958T23U G958T24U RANGE PACKAGE (Pb free) -40°C~85°C -40°C~85°C TEMP. MARKING 1 PIN OPTION 2 3 SOT-89 GND/ADJ VOUT VIN SOT-89 GND/ADJ VIN VOUT * For other package types and pin options, please contact us at sales @gmt.com.tw Order Number Identification GXXX XX X X Packing Type Pin Option Package Type Part Number PACKAGE TYPE PIN OPTION 1 3: GND/ADJ 4: GND/ADJ T2: SOT-89 2 VOUT VIN PACKING 3 VIN VOUT Package Type U: Tape & Reel Typical Application Circuit [Note 4]: Type of COUT IO VIN VIN Top View 2 VOUT VOUT GND/ADJ C1 1µF 1 G958 R1 COUT 10µF R2 3 SOT-89 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 1 G958 Global Mixed-mode Technology Inc. Absolute Maximum Ratings (Note 1) Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Power Dissipation Internally Limited (Note 2) Maximum Junction Temperature. . . . . . . . . . . . . . 150°C Reflow Temperature (soldering, 10sec) . . . . . . . 260°C Thermal Resistance Junction to Ambient, (θJA) SOT-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126°C/W Thermal Resistance Junction to Case, (θJC) SOT-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29°C/W Operating Conditions (Note 1) (VIN-VADJ) Voltage . . . . . . . . . . . . . . . . . . . . . 2.5V~6.5V Temperature Range . . . . . . . . . . . .-40°C ≤ TA ≤85°C Electrical Characteristics Operating Conditions: VIN ≤ 6.5V, TJ = 25°C unless otherwise specified. [Note3] PARAMETER CONDITIONS MIN TYP MAX UNITS 1.225 ------- 1.250 1.32 0.04 1.2 1.275 ----1.3 V % % V (VIN - VOUT) = 2V 800 1200 --- mA VIN - VOUT = 2V, 10mA < IOUT < 0.5A 1.5V < (VIN - VOUT) < 5.25V --10 0.15 --- ----- µA mA --- 80 --- µA Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit VIN - VOUT = 2V, IOUT = 10mA (VOUT + 1.5V) < VIN < 6.5V, IOUT = 10mA (VIN - VOUT) = 2V, 10mA < IOUT < 0.5A ΔVOUT = 2%, IOUT = 0.5A Adjust Pin Current Change Minimum Load Current Quiescent Current VIN - VOUT = 2V --- 50 --- dB Thermal Regulation f = 120Hz, COUT = 10µF Tantalum, (VIN - VOUT) = 3V, IOUT = 100mA TA = 25°C, 30ms pulse --- 0.004 0.02 %/W Temperature Stability RMS Output Noise (% of VOUT) VIN = 4V, IO =10mA TA = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA ----- 0.3 0.007 ----- % % --- 180 --- °C/W --- 150 --- °C --- 10 --- °C Ripple Rejection Thermal Resistor Junction-to-Ambient SOT-89; Recommended Minimum Footprint (No heat sink; No air flow) Thermal Shutdown Junction Temperature Thermal Shutdown Hysteresis 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 G958 in SOT-89 package; θJA is 126°C/W (See Recommend Minimum Footprint). The safe operation in SOT-89 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 or aluminum. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 2 Global Mixed-mode Technology Inc. G958 Definitions Output Voltage The G958 provides an adjustable output voltage from 1.25V to 5V. With two external resistors. It can be formulated as: VOUT = 1.25V x (1+ R2 R1 voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that average chip temperature is not significantly affected. 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. ) + IADJ x R2 IADJ = 80µA (TYP) 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. Quiescent Bias Current Current which is used to operate the regulator chip and is not delivered to the load. Line Regulation The change in output voltage for a change in input TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 3 G958 Global Mixed-mode Technology Inc. Typical Performance Characteristics VIN= 4V, CIN=10µF, COUT=10µF, TA=25°C, unless otherwise noted. Line transient Load Transient Dropout Voltage vs. Load Current IADJ Current vs. Load Current 1.06 94 85°C 91 85°C 1.02 1 IADJ Current(mA) Dropout Voutput (V) 1.04 25°C 0.98 0.96 0.94 88 25°C 85 82 79 -45°C 76 -45°C 73 0.92 70 0.9 0 200 400 600 Output Current (mA) 800 0 1000 100 200 300 400 500 600 700 800 Load Current(mA) Temperature Stability Ripple Rejection 1 60 IOUT = 100mA (V IN - V OUT ) > 3V Output Voltage Change Ripple Rejection (dB) 50 40 IOUT = 800mA 30 20 COUT = 10µF IOUT = 0.1A~0.8A 10 100 1000 10000 Frequency (Hz) 0 -0.5 -1 -40 0 10 0.5 100000 -20 0 20 40 60 80 100 Temperature (°C) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 4 G958 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Output Noise Short-Circuit Current 1.60 1.50 Short-Circuit current (A) V IN = 4.5V IOUT = 10mA 115°C 1.40 1.30 25°C 1.20 1.10 -45°C 1.00 0.90 0.80 1.25 1.75 2.25 2.75 3.25 3.75 4.25 4.75 5.25 (V IN-V OUT ) Diffrential (V) Load Regulation Overcurrent Protection Characteristics Output Voltage Deviation (%) 0.15 0.1 0.05 0 -0.05 -0.1 -40 -25 -10 5 20 35 50 65 80 95 110 Temperature( °C) SOT-89 Max. Power Dissipation vs. PCB Top Copper Area SOT-89 Max. Power Dissipation vs. TAMB 3 3 2.5 2.5 Unit:in2 Max. Dissipation Power (W) Max. (W) Max.Dissipation Dissipation Power Power (W) A=0.1 2 1.5 1 0.5 A=0.2 A=0.3 A=0.4 2 A=0.5 A=1.0 A=1.5 1.5 A=2.0 A=2.5 1 A=3.0 A=3.5 A=4.0 0.5 A=4.5 A=5.0 0 0 0.5 0 11.5 22.5 3 3.5 4 4.5 5 25 PCB Top Copper Area (in22) PCB Top Copper Area (in ) 35 45 55 65 75 85 TAMB ( °C) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 5 Global Mixed-mode Technology Inc. G958 Recommend Minimum Footprint SOT-89 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Apr 18, 2006 6 G958 Global Mixed-mode Technology Inc. Package Information D D1 POLISH E HE A1 e C MATTE FINISH A b b b1 POLISH SOT-89 (T2) Package SYMBOL MIN DIMENSIONS IN MILLIMETER NOM MAX DIMENSIONS IN INCH MIN 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 4.40 1.40 4.50 1.60 4.60 1.75 0.173 0.055 0.177 0.062 0.181 0.069 HE ----- ----- 4.25 ----- ----- 0.167 E e 2.40 2.90 2.50 3.00 2.60 3.10 0.094 0.114 0.098 0.118 0.102 0.122 Package Specification PACKAGE Q’TY/REEL SOT-89 1,000 ea Feed Direction SOT-89 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: 1.1 Apr 18, 2006 7