Global Mixed-mode Technology Inc. 2.5V 500mA Low Dropout Regulator G905 Features General Description Dropout voltage typically 0.45V @ IO = 500mA Output current in 500mA Output voltage accuracy +2% Quiescent current, typically 0.6mA Internal short circuit current limit Internal over temperature protection The G905 positive 2.5V voltage regulator features the ability to source 500mA of output current with a dropout voltage of typically 0.45V. A low quiescent current is provided. The typical quiescent current is 0.6mA. Familiar regulator features such as over temperature and over current protection circuits are provided to prevent it from being damaged by abnormal operating conditions. Application CD-R/W DVD-ROM DVD player LAN Switch Broadband access Ordering Information ORDER NUMBER PACKAGE TYPE G905T24U SOT 89 1 PIN OPTION 2 3 GND VIN VOUT Order Number Identification GXXX XX X X Packing Type Pin Option Package Type Part Number PACKAGE TYPE PIN OPTION T2 : SOT 89 1 4 : GND 2 VIN PACKING 3 VOUT Typical Application U & D : Tape & Reel Direction Package Type [Note 4] : Type of COUT IO VIN G905 C1 1µF IQ Top View VOUT COUT 10µF 1 2 3 SOT 89 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Jan 31, 2002 1 G905 Global Mixed-mode Technology Inc. (Note 1) Absolute Maximum Ratings Input Voltage…………………………………………...7V Power Dissipation Internally Limited……….…...(Note2) Maximum Junction Temperature…………………150°C Storage Temperature Range..……-65°C ≤ TJ ≤+150°C Lead Temperature, Time for Wave Soldering SOT-89 Package……….……………….…...260°C, 10s Continuous Power Dissipation (TA=+25°C) SOT-89 (1)……………..……………………..……...0.5W Operating Conditions (Note 1) Input Voltage…………………………..………2.7V ~ 6V Temperature Range…………………...0°C ≤ TJ ≤125°C Note (1): See Recommended Minimum Footprint Electrical Characteristics VIN =5V, IO = 500mA, CIN=1µF, COUT =10µF. All specifications apply for TA = TJ = 25°C. [Note 3] PARAMETER Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Ripple Rejection Dropout Voltage Output Current CONDITIONS 10mA < IO <500mA 3.3V < VIN <6.5V, IO = 10mA 10mA < IO < 500mA 200mA DC and 100mA AC, fO = 120Hz VIN = 5V fi = 120Hz, Vripple=2VP-P, Io = 100mA MIN TYP MAX UNITS 2.45 2.5 1 20 80 0.6 46 2.55 50 60 V mV mV mΩ mA dB IO = 500mA 450 IO = 100mA Continuous Test, VIN = 3.3V TA = 25°C, TJ < 125°C, VOUT within ±2% (Note 3) 220 Minimum footprint 500 mV mA Short Circuit Current 0.77 A Over Temperature 150 °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 G905 in SOT-89 (T2) package, θJA is 250°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. 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 100mV 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: 1.1 Jan 31, 2002 2 G905 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN= +5V, CIN=1µF, COUT=10µF, TA=25°C, unless otherwise noted.) Line Transient Load Transient Ch1: Vin (offset=5.0V) Ch1: Iout (400mA/div) Ch2: Vout (offset=2.50V) Ch2: Vout is AC coupled CIN = 1µF Iout=100mA Output Voltage vs. Load Current Dropout Voltage vs. Load Current 2.630 700 600 Dropout Voltage (mV) Ootput Voltage (V) 2.610 2.590 2.570 2.550 2.530 2.510 2.490 500 400 300 200 100 2.470 2.450 0 0 50 100 150 200 250 300 350 400 450 500 0 Load Current (mA) 50 100 150 200 250 300 350 400 450 500 Load Current (mA) Ground Current vs. Load Current 2.00 1.80 Ground Current (mA) 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 0 50 100 150 200 250 300 350 400 450 500 Load Current (mA) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Jan 31, 2002 3 G905 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN= +3.3V, CIN=1µF, COUT=10µF, TA=25°C, unless otherwise noted.) Line Transient Load Transient Ch1: Vin (offset=3.3V) Ch2: Vout (offset=2.50V) CIN = 1µF Iout=100mA Ch1: Iout (400mA/div) Ch2: Vout is AC coupled Output Voltage vs. Load Current Dropout Voltage vs. Load Current 500 2.590 450 2.570 Dropout Voltage (mV) Ootput Voltage (V) 400 2.550 2.530 2.510 2.490 2.470 350 300 250 200 150 100 50 2.450 0 0 50 100 150 200 250 300 350 400 450 0 500 Load Current (mA) 50 100 150 200 250 300 350 400 450 500 Load Current (mA) Ground Current vs. Load Current 2.00 1.80 Ground Current (mA) 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 0 50 100 150 200 250 300 350 400 450 500 Load Current (mA) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Jan 31, 2002 4 G905 Global Mixed-mode Technology Inc. Typical Performance Characteristics (VIN= +5V, CIN=1µF, COUT=10µF, TA=25°C, unless otherwise noted.) Safe Operating of SOT-89 Maximum Power Dissipation of SOT-89 0.7 600 Maximum recommended output current T A=25°C,Still Air 0.6 Power Dissipation (W) Output Current (mA) 500 400 TA=25℃ 300 TA=55℃ TA=85℃ 200 1oz Copper on SOT-89 Package 1Mounted on recommended mimimum footprint (RθJA =250°C/W) 100 0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 2.8 3.0 3.3 0.5 0.4 0.3 0.2 Still Air 1oz Copper on SOT-89 Package Mount on recommend footprint (RθJA=250°C/W) 0.1 0.0 3.5 25 Input-Output Voltage Differential VIN-VOUT (V) 35 45 55 65 75 85 95 105 Amibent Temperature T A (℃) 115 125 Recommend Minimum Footprint TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.1 Jan 31, 2002 5 G905 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 SYMBOLS A A1 b b1 C D D1 HE E e DIMENSIONS IN MILLIMETERS MIN NOM MAX MIN 1.40 0.80 0.36 0.41 038 4.40 1.40 ----2.40 2.90 0.055 0.031 0.014 0.016 0.014 0.173 0.055 ----0.094 0.114 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 INCHES NOM MAX 0.059 0.041 0.016 0.018 0.015 0.177 0.062 ----0.098 0.118 0.063 ----0.048 0.020 0.017 0.181 0.069 0.167 0.102 0.122 Package Orientation 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 Jan 31, 2002 6