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| GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Description 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). Features 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 1.0A 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 Portable Cameras Video Recorders Battery Powered Equipment Reference Voltage Sources Typical Application Circuits GM6251-x.x VIN VIN VSS VOUT RL CIN 1F (Tantalum) 1F COUT (Tantalum) www.gammamicro.com.tw 1 1 GM6251V1.00 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Marking Information and Pin Configurations (Top View) SOT25 TO92 SOT89 VOUT 5 NC 4 FAVYW 1 2 3 VIN VSS NC 6251 VV AYWW GM6251 VVAYWW 1 2 VOUT VSS 3 VIN 123 VOUTVSS VIN V: Voltage Code (see next page) VV: Voltage suffix (18 = 1.8V, 50 = 5.0V...) Y: Year W: Week code WW: Week GM6251V1.00 2 2 GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Information Ordering Number GM6251-1.8T92B GM6251-1.8T92RL GM6251-1.8ST25R GM6251-1.8ST89R GM6251-2.5T92B GM6251-2.5T92RL GM6251-2.5ST25R GM6251-2.5ST89R GM6251-2.7T92B GM6251-2.7T92RL GM6251-2.7ST25R GM6251-2.7ST89R GM6251-2.8T92B GM6251-2.8T92RL GM6251-2.8ST25R GM6251-2.8ST89R GM6251-3.0T92B GM6251-3.0T92RL GM6251-3.0ST25R GM6251-3.0ST89R 3.0V 2.8V 2.7V 2.5V 1.8V Output Voltage Voltage Code Package TO-92 TO-92 E SOT-25 SOT-89 TO-92 TO-92 G SOT-25 SOT-89 TO-92 TO-92 T SOT-25 SOT-89 TO-92 TO-92 H SOT-25 SOT-89 TO-92 TO-92 J SOT-25 SOT-89 Shipping 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 3 3 GM6251V1.00 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Information (Continued) Ordering Number GM6251-3.2T92B GM6251-3.2T92RL GM6251-3.2ST25R GM6251-3.2ST89R GM6251-3.3T92B GM6251-3.3T92RL GM6251-3.3ST25R GM6251-3.3ST89R GM6251-3.5T92B GM6251-3.5T92RL GM6251-3.5ST25R GM6251-3.5ST89R GM6251-3.6T92B GM6251-3.6T92RL GM6251-3.6ST25R GM6251-3.6ST89R GM6251-4.0T92B GM6251-4.0T92RL GM6251-4.0ST25R GM6251-4.0ST89R GM6251-4.4T92B GM6251-4.4T92RL GM6251-4.4ST25R GM6251-4.4ST89R GM6251-4.5T92B GM6251-4.5T92RL GM6251-4.5ST25R 4.5V 4.4V 4.0V 3.6V 3.5V 3.3V 3.2V Output Voltage Voltage Code Package TO-92 TO-92 U SOT-25 SOT-89 TO-92 TO-92 K SOT-25 SOT-89 TO-92 TO-92 V SOT-25 SOT-89 TO-92 TO-92 L SOT-25 SOT-89 TO-92 TO-92 M SOT-25 SOT-89 TO-92 TO-92 W SOT-25 SOT-89 TO-92 TO-92 N SOT-25 SOT-89 TO-92 5.0V TO-92 Q SOT-25 SOT-89 Shipping 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel 1,000 Units/Bag 2,000 Units/Ammo Pack (Tape) 3,000 Units/Tape and Reel 1,000 Units/Tape and Reel GM6251V1.00 4 4 GM6251-4.5ST89R GM6251-5.0T92B GM6251-5.0T92RL GM6251-5.0ST25R GM6251-5.0ST89R GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Absolute Maximum Ratings PARAMETER Input Voltage Output Current Output Voltage SOT-25 Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature SOT-89 TO-92 TA Tstg PD SYMBOL VIN IOUT VOUT RATINGS 12 500 VSS - 0.3 to VIN +0.3 150 500 300 - 40 to 125 - 65 to 150 J J mW UNITS V mA V Block Diagram VIN VOUT Current Limit Voltage Reference VSS 5 5 GM6251V1.00 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Electrical Characteristics (TA = 25J Parameter GM6251-1.8 GM6251-2.5 GM6251-2.7 GM6251-2.8 GM6251-3.0 GM6251-3.2 Output Voltage GM6251-3.3 GM6251-3.5 GM6251-3.6 GM6251-4.0 GM6251-4.4 GM6251-4.5 GM6251-5.0 Line Regulation Load Regulation VOUT > 2.5V Dropout Voltage 2.0V < VOUT < 2.5V VOUT < 2.0V Current Consumption Output Current Limit IQ ICL V VOI VOL VOUT , VIN = VOUT + 1V unless otherwise noted) Min 1.764 2.450 2.646 2,744 2.940 3.136 Symbol Condition Typ 1.800 2.500 2.700 2.800 3.000 3.200 3.300 3.500 3.600 4.000 4.400 4.500 5.000 0.2 0.02 0.4 Max 1.836 2.550 2.754 2.856 3.060 3.264 3.366 3.570 3.672 4.080 4.488 4.590 5.100 0.3 0.03 0.7 0.85 1.3 2.9 Unit IOUT = 40mA, VIN = VOUT + 1V 3.234 3.430 3.528 3.920 4.312 4.410 4.900 V IOUT = 40mA, VOUT + 1V < VIN < 10V 1mA < IOUT < 80mA %/V %/mA IOUT = 180mA 0.55 0.9 1.0 500 V A mA GM6251V1.00 6 6 GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Application Note Notes on Usage 1. 2. 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. 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 10, it is recommend to use a capacitor (CIN) of at least 1F at the input terminal. 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. 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. 3. 4. 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. 2. 3. 4. Maximum Ambient Temperature TA (J ) Power Dissipation PD (Watts) Maximum Junction Temperature TJ (J ) Thermal Resistance Junction to ambient RJA (J /W) These relationship of these four factors is expressed by equation : TJ = TA + PD X RJA 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 GM6251V1.00 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Typical Performance Characteristics (for GM6251-3.0) 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 Input-Output Voltage Difference- VDIF (V) 3.1 CIN = 1F CL = 11F Output Voltage - VOUT (V) 3.0 TOPR = 25C 2.9 2.8 VIN = 4V CIN = 1F CL = 11F 20 40 60 80 100 120 140 160 180 TOPR = 25C 2.7 0 20 40 60 80 100 120 140 160 180 Output Current: IOUT (mA) Figure 1: Output Voltage vs. Output Current Figure 2: Input/ Output Voltage differential vs. Output Current 3.20 3.10 Output Voltage: VOUT (V) IOUT=1mA Output Voltage: VOUT (V) 3.00 3.05 IOUT=1mA 2.80 3.00 2.60 40mA 10mA TOPR = 25C CIN=1F CL=1F 3.0 3.5 40mA 2.95 10mA 2.40 2.90 TOPR = 25C CIN=1F CL=1F 3 4 5 6 7 8 9 10 2.20 2.5 2.85 Input Voltage: VIN (V) Figure 3: Output Voltage vs. Input voltage Input Voltage: VIN(V) Figure 4: Output Voltage vs. Input voltage 3.0 2.50 Supply Current:ISS(A) Supply Current: ISS(A) TOPR = 25C 2.0 2.25 TOPR = 25C 2.00 1.0 1.75 GM6251V1.00 0 1.50 0 2 4 6 8 10 3 4 5 6 7 8 9 10 Input Voltage: VIN(V) Input Voltage: VIN(V) Figure 5: Supply Current vs. Input Voltage Figure 6: Supply Current vs. Input Voltage 8 8 GM6251 300mA ULTRA LOW DROPOUT POSITIVE VOLTAGE REGULATOR Typical Performance Characteristics (for GM6251-3.0, continued) 6 6 6 5.0 Input Voltage Output Voltage - VIOUT (V) 4 5 4 3 2 Input Voltage - VIN (V) 2 0 Input Voltage - VIN (V) 5 4.5 4 Output Voltage -2 -4 -6 IOUT = 1mA CL = 1F 4.0 3 3.5 IOUT = 1mA CL = 1F Time (0.4msec/div) 1 0 2 Output Voltage 3.0 1 2.5 Time (1msec/div) Figure 7: Input Transient Response 1 60 Figure 8: Input Transient Response 2 Ripple Rejection Rate :RR (dB) 50 40 30 20 10 0 0.01 VIN = 4VDC + 1VPPAC IOUT = 40mA CL = 1F 0.1 1 10 Ripple Frequency: f (kHz) Figure 9: Ripple Rejection Rate Output Voltage - VIOUT (V) Input Voltage 9 9 GM6251V1.00 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) 0.035 - 0.047 (0.89 - 1.19) 0.016 - 0.019 (0.33 - 0.48) 0.059 BSC (1.49) BSC 0.090 - 0.120 (2.28 - 2.59) 8 0.055 - 0.063 (1.39 - 1.60) 0.015 - 0.017 (0.38 - 0.43) GM6251V1.00 0.118 BSC (2.99) BSC 10 10 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 2.10 - 2.27 Dimensions are in millimeters 11 11 GM6251V1.00 GM6251 300mA ULTR LOW DROPOUT POSITIVE VOLTAGE REGULATOR Ordering Number GM 6251 - 1.8 APM Gamma Micro Circuit Type Output Voltage 1.8 2.5 3.3 5.0 = = = = 1.8V 2.5V 3.3V 5.0V T92 Package Type T92: TO 92 ST89: SOT 89 ST25: SOT 25 B Shipping Type B: Bag RL: Ammo Pack (Tape) T: Tube R: Tape & Reel GM6251V1.00 12 12 |
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