GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Description Features GM7130 series is designed to provide all the active function for a step-down (buck) switching regulator, and drives a maximum load current as high as 3A line and load regulations. GM7130 is available in fixed output voltages of 3.3V, 5V, 12V and a versatile Adjustable output version. These regulators are simple to use and require minimum number of external components. The features include internal frequency compensation and a fixed-frequency oscillator. The GM7130 is high-efficiency replacements for popular three-terminal linear regulators, and is requiring a smaller heat sink or even no need heat sink. GM7130 performs well with standard inductors from most of manufacturers, and simplifying the design of switch-mode power supplies. External shutdown is included with 80 µA (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shutdown for full protection under fault conditions. 3.3V, 5V, 12V and Adjustable output versions Adjustable version output voltage range 1.23V to 37V VOUT accuracy is up to ±2% under specified input voltage the output load conditions Input voltage range up to 40V Requires only 4 external components with High efficiency TTL shutdown capability, low power standby mode Built-in thermal shutdown, current limit protection Uses standard inductors 52 kHz fixed frequency internal oscillator GM7130 operates at a switching frequency of 52 kHz which allowing smaller size filter components than what would be needed with lower frequency switching regulators. GM7130 series are available in a standard 5-lead TO-220, TO220B and TO263 packages. Application Pre-regulator for linear regulators On-card/board switching regulators High-efficiency step-down buck regulator Positive to negative converter (buck-boost) Typical Application Circuits GM7130-5.0 7V – 40V Unregulated DC Input Feedback 4 1 VIN GM7130V1.11 Output 5 2 CIN 100µF GND 3 L1 100µH ON/OFF 5 D1 1N5822 5V regulated output, COUT 680µF www.gammamicro.com.tw GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Marking Information and Pin Configurations (Top View) TO-220-5 TO-220B-5 TO-263-5 GM7130 VVAYWW GM7130 VVAYWW GM7130 VVAYWW 5. ON/OFF 4. Feedback 3. GND 2. Output 1. VIN 5. ON/OFF 4. Feedback 3. GND 2. Output 1. VIN 5. ON/OFF 4. Feedback 3. GND 2. Output 1. VIN GM7130V1.11 VV: Voltage suffix (15 = 1.5V, 50 = 5.0V…A = Adj) A: Assembly / Test site code Y: Year WW: Week 3 GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Ordering Information Ordering Number Output Voltage Package Shipping TO-263-5 50 Units / Tube TO-263-5 800 Units / Reel TO-220-5 50 Units / Tube GM7130-ATB5BT TO-220-5B 50 Units / Tube GM7130-3.3TA5T TO-263-5 50 Units / Tube TO-263-5 800 Units / Reel TO-220-5 50 Units / Tube GM7130-3.3B5BT TO-220-5B 50 Units / Tube GM7130-5.0TA5T TO-263-5 50 Units / Tube TO-263-5 800 Units / Reel TO-220-5 50 Units / Tube GM7130-12B5BT TO-220-5B 50 Units / Tube GM7130-12TA5T TO-263-5 50 Units / Tube TO-263-5 800 Units / Reel TO-220-5 50 Units / Tube TO-220-5B 50 Units / Tube GM7130-ATA5T GM7130-ATA5R GM7130-ATB5T GM7130-3.3A5R GM7130-3.3B5T GM7130-5.0A5R GM7130-5.0B5T GM7130-12A5R GM7130-12B5T GM7130V1.11 GM7130-12B5BT 4 Adj 3.3 5.0 12 GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Absolute Maximum Ratings (Note 1) Rating Value Unit Maximum Supply Voltage 45 V ON/OFF Pin Input Voltage -0.3 + VIN + 0.3 V Feedback Pin Voltage -0.3 + VIN + 0.3 V -1.0 V Internally Limited - Output Voltage to Ground (Steady State) Power Dissipation Thermal Resistance* Junction to Ambient, θJA TO-220-5 65 TO-263-5 45 Junction to Case, θJC TO-220-5 2 TO-263-5 2 Storage Temperature Range °C/W - 65 to 150 °C + 150 °C Operating Temperature Range - 40 to 125 °C Minimum ESD Rating (Note 2) 2 kV + 260 °C Maximum Junction Temperature Lead Temperature (Soldering, 10 sec) * θJA is measured with minimum copper area for TO-220-5 package, and copper area (must connected to ground) of around 0.5 in for TO-263-5 package. 2 Block Diagram FB 5 VIN R2* 1 Regulator With Enable Error Amplifier Comparator Driver 4 ON/OFF R1* 1.23V Reference 3 52KHz Oscillator VOUT = 3.3V, R1 = 2.49K, R2 = 4.18K VOUT = 5.0V, R1 = 2.49K, R2 = 7.57K VOUT = ADJ, R1 = OPEN, R2 = 0Ω Reset Thermal Shutdown & Current Limit 2 VOUT GM7130V1.11 Gnd 5 GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Electrical Characteristics: GM7130-ADJ (Specifications with standard type face are for TJ = 25℃, and those with bold face type apply over full Operating Temperature rage) Parameter Condition Symbol Efficiency 8.0V < VIN < 40V, 0.5A < ILOAD < 3A, VOUT = 5V VIN =12V, ILOAD=3.0A, VOUT = 5V Typ 1.217 VIN = 12V, ILOAD = 0.5A, VOUT = 5V Feedback Voltage Min VOUT 1.193 Unit 1.243 1.230 1.180 η Max V 1.267 1.280 77 % Electrical Characteristics: GM7130-3.3 (Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature rage) Parameter Condition Symbol Efficiency 6V < VIN < 40V, 0.5A < ILOAD < 3A VIN =12V, ILOAD=3.0A Typ 3.234 VIN = 12V, ILOAD = 0.5A Output Voltage Min VOUT 3.168 Unit 3.366 3.300 3.135 η Max 3.432 V 3.465 75 % Electrical Characteristics: GM7130-5.0 (Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature rage) Parameter Condition Symbol Efficiency 8V < VIN < 40V, 0.5A < ILOAD < 3A VIN =12V, ILOAD=3.0A Typ 4.900 VIN = 12V, ILOAD = 0.5A Output Voltage Min VOUT 4.800 Unit 5.100 5.000 4.750 η Max 5.200 V 5.250 77 % Electrical Characteristics: GM7130-12 (Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature rage) Parameter Condition Symbol GM7130V1.11 Efficiency 6 15V < VIN < 40V, 0.5A < ILOAD < 3A VIN =15V, ILOAD=3.0A Typ 11.76 VIN = 25V, ILOAD = 0.5A Output Voltage Min VOUT 11.52 Unit 12.24 12.00 11.40 η Max 12.48 V 12.60 88 % GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Electrical Characteristics: All Output Voltage Versions (Specifications with standard type face are for TJ = 25℃, and those with bold face type apply over full Operating Temperature rage. Unless otherwise specified, VIN = 12V for 3.3V, 5.0V and Adj version, VIN = 25V for 12V version, ILOAD = 500mA) Parameter Condition Symbol Min Typ Feedback Bias Current VOUT =5V (Adjustable Version Only) Ib - 50 Oscillator Frequency (Note 3) fo 47 Saturation Voltage lOUT = 3A (Notes 4, 5) Max Duty Cycle (ON) (Note 5) DC Current Limit Peak Current (Notes 4, 5) lCL 52 Quiescent Current Standby Quiescent Current ON/OFF Pin Logic lnput Level nA - 58 kHz 63 1.4 1.8 V 2.0 93 4.2 98 5.8 3.5 Output Leakage Current 100 Unit 500 42 VSAT Max Output =0V (Notes 4, 6) Output = -1V (Notes 4, 6) (Note 6) ON/OFF= 5V (OFF) Low (ON) lL - 6.9 A 7.5 7.5 2 mA 30 lQ - 5 10 mA lSTBY - 50 200 µA VIH - 1.2 1.0 0.8 High (OFF) % VIL 2.2 1.4 - V 2.4 VLOGlC = 2.5V (OFF) IH 12 30 VLOGlC = 0.5V (ON) IL 0 10 µA Note 1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Note 2: The human body model is a 100pF capacitor discharge through a 1.5KΩ resistor into each pin. Note 3: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. Where the GM2576 is used as shown in Figure 1&2 test circuits. Note 4: No diode, inductor or capacitor connected to output pin. Note 5: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 6: Feedback pin removed from output and connected to 12V for the 3.V, 5V and Adj version, to force the output transistor switch OFF. GM7130V1.11 ON/OFF Pin Input Current 7 GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Test Circuit and Layout Guidelines Careful layout is important with any switching regulators. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. To minimize inductance and ground loops, the lengths of the leads indicated by heavy lines in Figure 1&2 below should be kept as short as possible. Single point grounding (as indicated or ground plane construction should be used for best results. When using the Adjustable version, place the programming resistors as close as possible to GM2576, to keep the sensitive feedback wiring short. 4 Feedback 1 GM7130-x.x VIN VIN Unregulatedd DC Input 3 GND CIN 100µF 2 Output L1 100µH VOUT D1 5 ON/OFF L O A D COUT 680µF Figure 1 Fixed Ouput Votlage Versions CIN = 100µF, Aluminum Electrolytic COUT = 680µF, 25V, Aluminum Electrolytic D1 = Schottky L1 = 100µH 1 4 FB GM7130-ADJ VIN GM7130V1.11 VIN Unregulatedd DC Input 8 CIN 100µF 3 GND L1 100µH VOUT 2 VOUT 5 ON/OFF R2 D1 COUT 680µF Figure 2 Adjustable Ouput Votlage Versions CIN = 100µF, Aluminum Electrolytic COUT = 680µF, 25V, Aluminum Electrolytic D1 = Schottky L1 = 100µH VOUT = VREF (1 + R2/R1) where VREF = 1.23V and R1 is between 1K to 5K R1 L O A D GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Package Outline Dimensions – TO-263-5 0.176 - 0.184 (4.47 - 4.67) 0.046 - 0.054 (1.17 - 1.37) 0.389 - 0.408 (9.88 - 10.18) 0.061 - 0.069 (1.56 - 1.76) 0.322 - 0.339 (8.20 - 8.60) 0.028 - 0.036 (0.71 - 0.91) 0.596 - 0.612 (15.14 - 15.54) 3 7 0.200 - 0.216 (5.08 - 5.48) o 0-8 o 0.092 - 0.108 (2.34 - 2.74) 0.012 - 0.021 (0.31 - 0.53) 0.224 - 0.272 (5.70 - 6.90) 0.067 typ (1.70) Package Outline Dimensions – TO-220-5 0.048 - 0.052 (1.22 - 1.32) 0.400 + 0.015 0.400 - 0.005 (0.38 + 0.18) (0.38 - 0.03) 0.240 - 0.260 (6.10 - 6.60) 0.175 - 0.185 (4.45 - 4.75) 0.100 - 0.120 (2.54 - 3.05) 0.149 - 0.153 (3.78 - 3.89) 0.330 - 0.350 (8.38 - 8.89) 0.525 - 0.555 (13.34 - 14.10) 0.030 - 0.040 (0.76 - 1.02) 0.057 - 0.077 (1.45 - 1.96) 0.105 + 0.010 0.105 - 0.010 0.015 + 0.007 0.015 - 0.001 (2.67 + 0.25) (2.67 - 0.38) (0.38 + 0.18) (0.38 - 0.03) GM7130V1.11 0.525 - 0.555 (13.34 - 14.10) 9 GM7130 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Ordering Number GM 7130 A GM7130V1.11 APM Gamma Micro 10810 6 Circuit Type TA5 R Output Voltage Package Type Shipping Type A: Adj 3.3 = 3.3V 5.0 = 5.0V 12 = 12.0V TA5: TO263-5 TB5: TO-220-5 TB5B: TO-220B-5 R: Taping & Reel T: Tube