GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Description Features GM6251 combines high accuracy with very low power consumption, and provides high output current even when the application requires extremely low input-output voltage dropout. GM6251 includes a precision voltage reference, an error correction circuit, over-temperature protection, and a current limited output driver. Fast transient response to load variations provides excellent stability under dynamic loads. GM6251 comes in SOT-25 (150mW), TO92 and SOT-89 (500mW). Maximum output current up 300mA Output voltage from 1.5V to 5.0V in 0.1V increments Output voltage accuracy : ±2% CMOS low power consumption, typically 1.0µA at VOUT = 5.0V Input stability: typically 0.2%/V Ultra low dropout voltage: 0.38V @ IOUT = 200mV at VOUT = 5.0V SOT-25 (150mW), SOT-89 (500mW) and TO-92 packages Application Palmtops Battery Powered Equipment Portable Cameras Reference Voltage Sources Video Recorders Typical Application Circuits GM6251-x.x VOUT CIN 1µF (Tantalum) VSS RL COUT 1µF (Tantalum) GM6251V1.00 VIN VIN www.gammamicro.com.tw 1 1 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Marking Information and Pin Configurations (Top View) SOT25 VOUT 5 NC 4 FAVYW TO92 6251 VV AYWW 1 2 3 VIN VSS NC GM6251V1.00 V: Voltage Code (see next page) VV: Voltage suffix (18 = 1.8V, 50 = 5.0V…) Y: Year W: Week code WW: Week 2 GM6251 VVAYWW 1 2 VOUT VSS 1 2 3 VOUTVSS VIN 2 SOT89 3 VIN GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Number Output Voltage Voltage Code GM6251-1.8T92B GM6251-1.8T92RL GM6251-1.8ST25R 1.8V E GM6251-1.8ST89R GM6251-2.5T92B GM6251-2.5T92RL GM6251-2.5ST25R 2.5V G GM6251-2.5ST89R GM6251-2.7T92B GM6251-2.7T92RL GM6251-2.7ST25R 2.7V T GM6251-2.7ST89R GM6251-2.8T92B GM6251-2.8T92RL GM6251-2.8ST25R 2.8V H GM6251-2.8ST89R GM6251-3.0T92B GM6251-3.0T92RL GM6251-3.0ST25R GM6251-3.0ST89R 3.0V J Package Shipping TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel GM6251V1.00 Ordering Information 3 3 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Information (Continued) Ordering Number Output Voltage Voltage Code GM6251-3.2T92B GM6251-3.2T92RL GM6251-3.2ST25R 3.2V U GM6251-3.2ST89R GM6251-3.3T92B GM6251-3.3T92RL GM6251-3.3ST25R 3.3V K GM6251-3.3ST89R GM6251-3.5T92B GM6251-3.5T92RL GM6251-3.5ST25R 3.5V V GM6251-3.5ST89R GM6251-3.6T92B GM6251-3.6T92RL GM6251-3.6ST25R 3.6V L GM6251-3.6ST89R GM6251-4.0T92B GM6251-4.0T92RL GM6251-4.0ST25R 4.0V M GM6251-4.0ST89R GM6251-4.4T92B GM6251-4.4T92RL GM6251-4.4ST25R 4.4V W GM6251-4.4ST89R GM6251-4.5T92B GM6251-4.5T92RL GM6251-4.5ST25R 4.5V N GM6251V1.00 GM6251-4.5ST89R GM6251-5.0T92B GM6251-5.0T92RL GM6251-5.0ST25R GM6251-5.0ST89R 4 4 5.0V Q Package Shipping TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel TO-92 1,000 Units/Bag TO-92 2,000 Units/Ammo Pack (Tape) SOT-25 3,000 Units/Tape and Reel SOT-89 1,000 Units/Tape and Reel GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Absolute Maximum Ratings PARAMETER SYMBOL RATINGS UNITS Input Voltage VIN 12 V Output Current IOUT 500 mA Output Voltage VOUT VSS – 0.3 to VIN +0.3 V SOT-25 Continuous Total Power Dissipation 150 PD SOT-89 TO-92 mW 500 300 Operating Ambient Temperature TA - 40 to 125 ℃ Storage Temperature Tstg - 65 to 150 ℃ Block Diagram VIN VOUT Current Limit Voltage Reference GM6251V1.00 VSS 5 5 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Electrical Characteristics (TA = 25℃, VIN = VOUT + 1V unless otherwise noted) Parameter Output Voltage Min Typ Max GM6251-1.8 1.764 1.800 1.836 GM6251-2.5 2.450 2.500 2.550 GM6251-2.7 2.646 2.700 2.754 GM6251-2.8 2,744 2.800 2.856 GM6251-3.0 2.940 3.000 3.060 GM6251-3.2 3.136 3.200 3.264 3.234 3.300 3.366 GM6251-3.5 3.430 3.500 3.570 GM6251-3.6 3.528 3.600 3.672 GM6251-4.0 3.920 4.000 4.080 GM6251-4.4 4.312 4.400 4.488 GM6251-4.5 4.410 4.500 4.590 GM6251-5.0 4.900 5.000 5.100 GM6251-3.3 Symbol VOUT Condition IOUT = 40mA, VIN = VOUT + 1V ∆VOI IOUT = 40mA, VOUT + 1V < VIN < 10V 0.2 0.3 %/V Load Regulation ∆VOL 1mA < IOUT < 80mA 0.02 0.03 %/mA 0.4 0.7 0.55 0.85 0.9 1.3 1.0 2.9 VOUT > 2.5V 2.0V < VOUT < 2.5V ∆V IOUT = 180mA GM6251V1.00 VOUT < 2.0V 6 V Line Regulation Dropout Voltage 6 Unit Current Consumption IQ Output Current Limit ICL 500 V µA mA GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Application Note Notes on Usage 1. It is recommended to operate the GM6251 series within the stipulated absolute maximum ratings as the IC is liable to malfunction it is operated outside the ratings. 2. There is a possibility of heat or oscillation as a result of the impedance present between the power supply and the IC's input. Where impedance is greater 10Ω, it is recommend to use a capacitor (CIN) of at least 1µF at the input terminal. 3. With a large output current, operations can be stabilized by increasing capacitor size (CIN). If CIN is too small and capacitance of (CL) is increased, there is a possibility of oscillation due to input impedance. In such case, operation can be stabilized by either increasing the size of CIN or decreasing the size of CL. 4. Please ensure the output current (IOUT) is less than Pd ÷ (VIN - VOUT) and does not exceed the stipulated continuous for total power dissipation value (Pd) for the package. CALCULATING POWER DISSIPATION The GM6251 series precision linear regulators include thermal shutdown and current limit circuitry to protect the devices. However, high power regulators normally operate at high junction temperatures so it is important to calculate the power dissipation and junction temperatures accurately to be sure that you use and adequate heat sink. The thermal characteristics of an IC depend four factors: 1. Maximum Ambient Temperature TA (℃) 2. Power Dissipation PD (Watts) 3. Maximum Junction Temperature TJ (℃) 4. Thermal Resistance Junction to ambient RJA (℃/W) These relationship of these four factors is expressed by equation : TJ = TA + PD X RJA GM6251V1.00 Maximum ambient temperature and power dissipation are determined by the design while the maximum junction temperature and thermal resistance depend on the manufacturer and the package type. 7 7 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Output Voltage – VOUT (V) 3.1 3.0 TOPR = 25°C 2.9 2.8 2.7 0 VIN = 4V CIN = 1µF CL = 11µF 20 40 60 80 100 120 140 160 180 Input-Output Voltage Difference– VDIF (V) Typical Performance Characteristics (for GM6251-3.0) 1.0 CIN = 1µF CL = 11µF 0.8 0.6 0.4 0.2 TOPR = 25°C 0.0 -0.2 20 40 60 80 100 120 140 160 180 Output Current: IOUT (mA) Figure 2: Input/ Output Voltage differential vs. Output Current Figure 1: Output Voltage vs. Output Current 3.10 Output Voltage: VOUT (V) 3.00 IOUT=1mA 2.80 40mA 2.60 10mA TOPR = 25°C CIN=1µF CL=1µF 2.40 2.20 2.5 Output Voltage: VOUT (V) 3.20 TOPR = 25°C CIN=1µF CL=1µF 2.90 3 4 5 6 7 8 9 Figure 4: Output Voltage vs. Input voltage 10 2.50 TOPR = 25°C Supply Current: ISS(µA) Supply Current:ISS(µA) GM6251V1.00 2.95 Figure 3: Output Voltage vs. Input voltage 2.0 1.0 2.25 TOPR = 25°C 2.00 1.75 1.50 0 2 4 6 8 Figure 5: Supply Current vs. Input Voltage 8 10mA Input Voltage: VIN(V) Input Voltage: VIN(V) 8 40mA Input Voltage: VIN (V) 3.0 0 IOUT=1mA 3.00 2.85 3.5 3.0 3.05 10 3 4 5 6 7 8 9 Input Voltage: VIN(V) Figure 6: Supply Current vs. Input Voltage 10 GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Typical Performance Characteristics (for GM6251-3.0, continued) 6 2 4 0 3 Output Voltage -2 2 IOUT = 1mA CL = 1µF -4 -6 Time (0.4msec/div) 1 Input Voltage 0 Figure 7: Input Transient Response 1 5 4 IOUT = 1mA CL = 1µF 1 4.0 3.5 3 2 4.5 Output Voltage 3.0 2.5 Time (1msec/div) Figure 8: Input Transient Response 2 VIN = 4VDC + 1VPPAC IOUT = 40mA CL = 1µF 50 40 30 20 10 0 0.01 0.1 1 10 Ripple Frequency: f (kHz) Figure 9: Ripple Rejection Rate GM6251V1.00 Ripple Rejection Rate :RR (dB) 60 Input Voltage – VIN (V) 5 Output Voltage – VIOUT (V) Input Voltage – VIN (V) 4 5.0 6 Input Voltage Output Voltage – VIOUT (V) 6 9 9 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Package Outline Dimensions – SOT 25 Package Outline Dimensions – SOT 89 0.173 - 0.181 (4.39 - 4.59) 0.067 - 0.072 (1.70 - 1.82) 0.084 - 0.090 (2.13 - 2.28) 0.155 - 0.167 (3.94 - 4.24) 0.090 - 0.120 (2.28 - 2.59) 8 0.035 - 0.047 (0.89 - 1.19) 0.016 - 0.019 (0.33 - 0.48) 0.059 BSC (1.49) BSC GM6251V1.00 0.118 BSC (2.99) BSC 10 10 0.055 - 0.063 (1.39 - 1.60) 0.015 - 0.017 (0.38 - 0.43) GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Package Outline Dimensions – TO 92 3.85 - 4.19 4.7 - 5.2 4.9 - 5.2 12.7 - 14.2 0.4 - 0.55 Typ. 1.22 - 1.32 Dimensions are in millimeters GM6251V1.00 2.10 - 2.27 11 11 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Number GM 6251 - 1.8 GM6251V1.00 APM Gamma Micro 12 12 Circuit Type T92 B Output Voltage Package Type Shipping Type 1.8 2.5 3.3 5.0 T92: TO 92 ST89: SOT 89 ST25: SOT 25 B: Bag RL: Ammo Pack (Tape) T: Tube R: Tape & Reel = = = = 1.8V 2.5V 3.3V 5.0V