G958T24U

Global Mixed-mode Technology Inc. G958 800mA Adjustable Low-Dropout Linear Regulator Features Available in Adjust Version Space Saving SOT-89 Package Internal Short Circuit Current Limiting Internal Over Temperature Protection Current limit in Excess of 800mA 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. The G958 provides over temperature and over current protection circuits to prevent it from being damaged by abnormal operating conditions. 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. Applications Post Regulation for Switching DC/DC Converter Voltage Regulator for CD-ROM Driver Voltage Regulator for LAN Card Battery Powered Instrumentation Motherboard Ordering Information ORDER NUMBER G958T23U G958T24U MARKING 958 3xx 958 4xx TEMP. RANGE -40°C~85°C -40°C~85°C PACKAGE (Pb free) SOT-89 SOT-89 1 GND/ADJ GND/ADJ PIN OPTION 2 VOUT VIN 3 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 T2: SOT-89 PIN OPTION 1 3: GND/ADJ 4: GND/ADJ 2 VOUT VIN 3 VIN VOUT PACKING U: Tape & Reel Package Type Typical Application Circuit [Note 4]: Type of COUT IO VIN VIN G958 GND/ADJ VOUT VOUT Top View C1 1µF R1 R2 COUT 10µF 1 2 3 SOT-89 Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 1 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 Electrical Characteristics Operating Conditions: VIN ≤ 6.5V, TJ = 25°C unless otherwise specified. [Note3] PARAMETER Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Adjust Pin Current Change Minimum Load Current Quiescent Current Ripple Rejection Thermal Regulation Temperature Stability RMS Output Noise (% of VOUT) G958 Operating Conditions (Note 1) (VIN-VADJ) Voltage . . . . . . . . . . . . . . . . . . . . . 2.5V~6.5V Temperature Range . . . . . . . . . . . .-40°C ≤ TA ≤85°C CONDITIONS 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 (VIN - VOUT) = 2V VIN - VOUT = 2V, 10mA < IOUT < 0.5A 1.5V < (VIN - VOUT) < 5.25V VIN - VOUT = 2V f = 120Hz, COUT = 10µF Tantalum, (VIN - VOUT) = 3V, IOUT = 100mA TA = 25°C, 30ms pulse VIN = 4V, IO =10mA TA = 25°C, 10Hz < f < 10kHz, ILOAD = 10mA MIN 1.225 ------800 --10 ----------------- TYP 1.250 1.32 0.04 1.2 1200 0.15 --80 50 0.004 0.3 0.007 180 150 10 MAX 1.275 ----1.3 ----------0.02 ----------- UNITS V % % V mA µA mA µA dB %/W % % °C/W °C °C 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. Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 2 Global Mixed-mode Technology Inc. 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+ 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. Line Regulation The change in output voltage for a change in input R2 R1 G958 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. 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. ) + IADJ x R2 Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 3 Global Mixed-mode Technology Inc. Typical Performance Characteristics VIN= 4V, CIN=10µF, COUT=10µF, TA=25°C, unless otherwise noted. Line transient Load Transient G958 Dropout Voltage vs. Load Current 1.06 1.04 Dropout Voutput (V) 1.02 1 0.98 0.96 0.94 0.92 0.9 0 200 400 600 Output Current (mA) 800 1000 -45°C 85°C IADJ Current(mA) 25°C 94 91 88 85 82 79 76 73 70 0 IADJ Current vs. Load Current 85°C 25°C -45°C 100 200 300 400 500 600 700 800 Load Current(mA) Ripple Rejection 60 IOUT = 100mA 50 Ripple Rejection (dB) Output Voltage Change Temperature Stability 1 (V IN - V OUT ) > 3V 40 IOUT = 800mA 30 20 10 0 10 100 1000 10000 Frequency (Hz) 100000 COUT = 10µF IOUT = 0.1A~0.8A 0.5 0 -0.5 -1 -40 -20 0 20 40 60 80 100 Temperature (°C) Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 4 Global Mixed-mode Technology Inc. Typical Performance Characteristics (continued) Output Noise 1.60 V IN = 4.5V IOUT = 10mA 1.50 Short-Circuit current (A) 1.40 1.30 1.20 1.10 1.00 0.90 25°C -45°C 115°C G958 Short-Circuit Current 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 0.15 Output Voltage Deviation (%) Overcurrent Protection Characteristics 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 3 Max. Dissipation Power (W) ) Max. Dissipation Power (W 2.5 Max. Dissipation Power (W) SOT-89 Max. Power Dissipation vs. TAMB 3 2.5 2 1.5 1 0.5 0 Unit:in2 A=0.1 A=0.2 A=0.3 A=0.4 A=0.5 A=1.0 A=1.5 A=2.0 A=2.5 A=3.0 A=3.5 A=4.0 A=4.5 2 1.5 1 0.5 0 0.5 0 1 1.5 22.5 3 3.5 4 4.5 5 PCB Top Copper Area (in2) PCB Top Copper Area (in2) A=5.0 25 35 45 55 65 75 85 TAMB ( °C) Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 5 Global Mixed-mode Technology Inc. Recommend Minimum Footprint SOT-89 G958 Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 6 Global Mixed-mode Technology Inc. Package Information D D1 G958 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 MIN 1.40 0.80 0.36 0.41 038 4.40 1.40 ----2.40 2.90 DIMENSIONS IN MILLIMETER NOM MAX 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 DIMENSIONS IN INCH MIN 0.055 0.031 0.014 0.016 0.014 0.173 0.055 ----0.094 0.114 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 Package Specification PACKAGE SOT-89 Q’TY/REEL 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. Ver: 1.1 Apr 18, 2006 TEL: 886-3-5788833 http://www.gmt.com.tw 7