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GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS
Description
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 A (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shutdown for full protection under fault conditions. 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.
Features
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
Application
Pre-regulator for linear regulators High-efficiency step-down buck regulator On-card/board switching regulators Positive to negative converter (buck-boost)
Typical Application Circuits
GM7130-5.0
7V - 40V Unregulated DC Input Feedback 4 1 VIN Output 5 L1 100H 5V regulated output,
GM7130V1.11
CIN 100F
GND 3
ON/OFF 5 D1 1N5822
COUT 680F
2
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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
1. VIN
2. Output
4. Feedback 3. GND
5. ON/OFF
1. VIN
2. Output
4. Feedback 3. GND
5. ON/OFF
GM7130V1.11
3
1. VIN
VV: Voltage suffix (15 = 1.5V, 50 = 5.0V...A = Adj) A: Assembly / Test site code Y: Year WW: Week
5. ON/OFF 4. Feedback 3. GND 2. Output
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS
Ordering Information
Ordering Number GM7130-ATA5T GM7130-ATA5R GM7130-ATB5T GM7130-ATB5BT GM7130-3.3TA5T GM7130-3.3A5R GM7130-3.3B5T GM7130-3.3B5BT GM7130-5.0TA5T GM7130-5.0A5R GM7130-5.0B5T GM7130-12B5BT GM7130-12TA5T GM7130-12A5R GM7130-12B5T GM7130-12B5BT 12 5.0 3.3 Adj Output Voltage Package TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B TO-263-5 TO-263-5 TO-220-5 TO-220-5B Shipping 50 Units / Tube 800 Units / Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units / Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units / Reel 50 Units / Tube 50 Units / Tube 50 Units / Tube 800 Units / Reel 50 Units / Tube 50 Units / Tube
GM7130V1.11
4
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS
Absolute Maximum Ratings (Note 1)
Rating Maximum Supply Voltage ON/OFF Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground (Steady State) Power Dissipation Junction to Ambient, JA Junction to Case, JC TO-220-5 TO-263-5 TO-220-5 TO-263-5 Value 45 -0.3 + VIN + 0.3 -0.3 + VIN + 0.3 -1.0 Internally Limited 65 45 2 2 - 65 to 150 + 150 - 40 to 125 2 + 260 C C C kV C
2
Unit V V V V -
Thermal Resistance*
C/W
Storage Temperature Range Maximum Junction Temperature Operating Temperature Range Minimum ESD Rating (Note 2) Lead Temperature (Soldering, 10 sec)
* JA 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.
Block Diagram
FB 5 R2* VIN 1 Regulator With Enable Comparator R1* 1.23V Reference Gnd 3 52KHz Oscillator Reset Thermal Shutdown & Current Limit 2 VOUT Driver
Error Amplifier
4 ON/OFF
VOUT = 3.3V, R1 = 2.49K, R2 = 4.18K VOUT = 5.0V, R1 = 2.49K, R2 = 7.57K VOUT = ADJ, R1 = OPEN, R2 = 0
GM7130V1.11
5
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS Electrical Characteristics: GM7130-ADJ
(Specifications with standard type face are for TJ = 25J , and those with bold face type apply over full Operating Temperature rage)
Parameter
Feedback Voltage Efficiency
Condition
VIN = 12V, ILOAD = 0.5A, VOUT = 5V 8.0V < VIN < 40V, 0.5A < ILOAD < 3A, VOUT = 5V VIN =12V, ILOAD=3.0A, VOUT = 5V
Symbol
Min
1.217
Typ
Max
1.243
Unit
VOUT
1.193 1.180
1.230
1.267 1.280
V
77
%
Electrical Characteristics: GM7130-3.3
(Specifications with standard type face are for T = 25J , and those with bold face type apply over full Operating Temperature rage)
Parameter
Condition
VIN = 12V, ILOAD = 0.5A
Symbol
Min
3.234
Typ
Max
3.366
Unit
Output Voltage
6V < VIN < 40V, 0.5A < ILOAD < 3A VIN =12V, ILOAD=3.0A
VOUT
3.168 3.135
3.300
3.432 3.465
V
Efficiency
75
%
Electrical Characteristics: GM7130-5.0
(Specifications with standard type face are for T = 25J , and those with bold face type apply over full Operating Temperature rage)
Parameter
Condition
VIN = 12V, ILOAD = 0.5A
Symbol
Min
4.900
Typ
Max
5.100
Unit
Output Voltage
8V < VIN < 40V, 0.5A < ILOAD < 3A VIN =12V, ILOAD=3.0A
VOUT
4.800 4.750
5.000
5.200 5.250
V
Efficiency
77
%
Electrical Characteristics: GM7130-12
(Specifications with standard type face are for T = 25J , and those with bold face type apply over full Operating Temperature rage)
Parameter
Condition
VIN = 25V, ILOAD = 0.5A
Symbol
Min
11.76
Typ
Max
12.24
Unit
Output Voltage
15V < VIN < 40V, 0.5A < ILOAD < 3A VIN =15V, ILOAD=3.0A
VOUT
11.52 11.40
12.00
12.48 12.60
V
Efficiency
88
%
GM7130V1.11
6
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS Electrical Characteristics: All Output Voltage Versions
(Specifications with standard type face are for TJ = 25J , 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
Feedback Bias Current Oscillator Frequency Saturation Voltage Max Duty Cycle (ON) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current
Condition
VOUT =5V (Adjustable Version Only)
Symbol
Ib fo
Min
47 42
Typ
50
Max
100 500 58 63
Unit
nA
(Note 3)
52
kHz
lOUT = 3A (Notes 4, 5) (Note 5) Peak Current (Notes 4, 5) Output =0V (Notes 4, 6) Output = -1V (Notes 4, 6) (Note 6)
VSAT DC lCL
93 4.2 3.5
1.4 98 5.8
1.8 2.0 6.9 7.5
V % A
lL lQ lSTBY
-
7.5 5 50
2 30 10 200 1.0 0.8
mA mA A
ON/OFF= 5V (OFF)
Low (ON)
ON/OFF
Pin Logic lnput Level
VIH
2.2 2.4
1.2
V
High (OFF) VLOGlC = 2.5V (OFF) VLOGlC = 0.5V (ON)
VIL IH IL
1.4 12 0
30 10 A
ON/OFF Pin Input Current 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. The human body model is a 100pF capacitor discharge through a 1.5K resistor into each pin. 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. No diode, inductor or capacitor connected to output pin. Feedback pin removed from output and connected to 12V for the 3.V, 5V and Adj version, to force the output transistor switch OFF. Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 2: Note 3:
Note 4: Note 5: Note 6:
GM7130V1.11
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.
1 VIN VIN Unregulatedd DC Input CIN 100F
4 Feedback
GM7130-x.x
3 GND 5 ON/OFF 2 Output
L1 100H D1 COUT 680F
VOUT L O A D
Figure 1 Fixed Ouput Votlage Versions
CIN = 100F, Aluminum Electrolytic COUT = 680F, 25V, Aluminum Electrolytic D1 = Schottky L1 = 100H
1 VIN VIN Unregulatedd DC Input CIN 100F
4 FB
GM7130-ADJ
3 GND 2 VOUT
L1 100H
VOUT R2 L O A D
5 ON/OFF
D1 COUT 680F R1
GM7130V1.11
Figure 2 Adjustable Ouput Votlage Versions
CIN = 100F, Aluminum Electrolytic COUT = 680F, 25V, Aluminum Electrolytic D1 = Schottky L1 = 100H VOUT = VREF (1 + R2/R1) where VREF = 1.23V and R1 is between 1K to 5K
8
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS
Package Outline Dimensions - TO-263-5
0.389 - 0.408 (9.88 - 10.18) 0.061 - 0.069 (1.56 - 1.76) 0.176 - 0.184 (4.47 - 4.67) 0.046 - 0.054 (1.17 - 1.37)
0.322 - 0.339 (8.20 - 8.60) 0.028 - 0.036 (0.71 - 0.91)
0.596 - 0.612 (15.14 - 15.54) 7 3
0.200 - 0.216 (5.08 - 5.48) 0-8 0.224 - 0.272 (5.70 - 6.90) 0.067 typ (1.70)
o o
0.092 - 0.108 (2.34 - 2.74) 0.012 - 0.021 (0.31 - 0.53)
Package Outline Dimensions - TO-220-5
0.400 + 0.015 0.400 - 0.005 (0.38 + 0.18) (0.38 - 0.03) 0.100 - 0.120 (2.54 - 3.05) 0.149 - 0.153 (3.78 - 3.89) 0.048 - 0.052 (1.22 - 1.32)
0.175 - 0.185 (4.45 - 4.75)
0.240 - 0.260 (6.10 - 6.60)
0.330 - 0.350 (8.38 - 8.89) 0.525 - 0.555 (13.34 - 14.10)
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 (2.67 + 0.25) (2.67 - 0.38)
0.015 + 0.007 0.015 - 0.001 (0.38 + 0.18) (0.38 - 0.03)
GM7130V1.11
9
GM7130
3A STEP DOWN VOLTAGE SWITCHING REGULATORS
Ordering Number
GM 7130 A
APM Gamma Micro Circuit Type Output Voltage A: Adj 3.3 = 3.3V 5.0 = 5.0V 12 = 12.0V
TA5
Package Type TA5: TO263-5 TB5: TO-220-5 TB5B: TO-220B-5
R
Shipping Type R: Taping & Reel T: Tube
GM7130V1.11
8 10 10 6

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