MICROELECTRONICS
A
A
Power Management
GM7130
3A STEP-DOWN VOLTAGE SWITCHING REGULATORS
Description
GM7130 of regulators provides all the active
functions for a step- down (buck) switching
regulator, and drives 3A load with excellent
line and load regulation. GM7130 is available
in fixed output voltages of 3.3V, 5V, 12V
15V , and a
versatile
Adjustable output
version. These regulators are simple to use
and require a minimum number of external
components. Features include internal fre-
quency compensation and a fixed-frequency
oscillator.
The GM7130 is high-efficiency replacements
for popular three-terminal linear regulators,
and is requiring a smaller heatsink or even
no heatsink.
GM7130 performs well with standard
inductors from several manufacturers, and
simplifying the design of switch-mode
power supplies. GM7130 guarantees ±4%
tolerance on output voltage within specified
input voltages and output load conditions,
and ±10% on the oscillator frequency.
External shutdown is induced with 50 uA
(typical) standby current. The output switch
has cycle-by-cycle current limiting as well
as thermal shutdown for full protection under
fault conditions.
Features
3.3V, 5V, 12V, 15V, Adjustable output versions
Adjustable version output voltage range 1.23V
to 37V ±4% max over line and load conditions
3A output current
Input voltage range 7V to 40V
Requires only 4 external components
High efficiency
TTL shutdown capability, low power standby
mode
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 APPLICATIONS
7V - 40V
Unregulated
DC Input
+V
IN
1
GM7130-5.0
Output
2
3
GND
5
ON/ OFF
D1
1N5822
100 µH
L1
+
+5V
Regulated
Output
3A Load
+
C
IN
100 µF
C
OUT
680 µF
www.gammamicro.com
GM7130
V0.1
1
Feedback
4
GM 431
MICROELECTRONICS
A
A
Power Management
GM7130
3A STEP-DOWN VOLTAGE SWITCHING REGULATORS
MARKING INFORMATION & PIN CONFIGURATIONS
(Top View)
TO-220-5
TO-220- 5B
TO-263-5(D PAK)
2
.
.
GM7130
V VAYWW
GM7130
VVAYWW
.
GM7130
VVAYWW
V
IN
Output
Ground
V
IN
Output
Ground
1 2 3 4 5
ON/OFF
Feedback
V
IN
Output
Ground
ON/OFF
Feedback
ON/OFF
Feedback
V V, VVV
A
Y
WW
= Output Voltage (33 = 3.3V, 120= 12V, A =A dj )
= Assembly Location
=Year
=Weekly
ORDERING INFORMATION
Ordering Number
GM7130-ATB5T
GM7130-ATB5BT
GM7130-ATA5R
GM7130-ATA5T
GM7130-3.3TB5T
GM7130-3.3TB5BT
GM7130-3.3TA5R
GM7130-3.3TA5T
GM7130-5.0TB5T
GM7130-5.0TB5BT
GM7130-5.0TA5R
GM7130-5.0TA5T
GM7130-12TB5T
GM7130-12TB5BT
GM7130-12TA5R
GM7130-12TA5T
GM7130-15TB5T
Output Voltage
Adj
Adj
Adj
Adj
3.3
3.3
3.3
3.3
5.0
5.0
5.0
5.0
12
12
12
12
15
15
15
15
Package
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
TO-263-5
TO-263-5
TO-220-5
TO-220-5B
TO-263-5
TO-263-5
Shipping
50 Units / Tube
50 Units / Tube
800 Units/ Tape & Reel
50 Units / Tube
50 Units / Tube
50 Units / Tube
800 Units/ Tape & Reel
50 Units / Tube
50 Units / Tube
50 Units / Tube
800 Units/ Tape & Reel
50 Units / Tube
50 Units / Tube
50 Units / Tube
800 Units/ Tape & Reel
50 Units / Tube
50 Units / Tube
50 Units / Tube
800 Units/ Tape & Reel
50 Units / Tube
GM7130
GM7130-15TB5BT
GM7130-15TA5R
GM7130-15TA5T
* TB5B: Bent and Staggered Leads of TO-220 package
** For detail Ordering Number identification, please see last page.
2
MICROELECTRONICS
A
A
Power Management
GM7130
3A STEP-DOWN VOLTAGE SWITCHING REGULATORS
ABSOLUTE MAXIMUM RATINGS
Rating
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
Minimum ESD Rating (C=100pF, R=1.5kW)
Lead Temperature (Soldering, 10 seconds)
Value
45
-0.3 V V
IN
-1.0
Internally Limited
-65 to + 150
+150
2
+260
Unit
V
V
V
-
°C
°C
kV
°C
OPERATING RATINGS
Rating
Operating Temperature Range
Supply Voltage
-40
Value
T
J
40
125
Unit
°C
V
BLOCK DIAGRAM
Unregulated
DC Input
V
IN
1
4
Feed-
back
R2
+
1.0K
R1
-
Fixed Gain
Error AMP
Internal
Regulator
ON/OFF
5
ON/OFF
+
C
IN
Comparator
+
-
3 AMP
Switch
Driver
Output
L1
2
1.23V
Band-Gap
Reference
D1
52kHz
Oscillator
Reset
Thermal
Shutdown
Current
Limit
+
V
OUT
3
GND
C
out
L
O
A
D
GM7130
3
GM 431
MICROELECTRONICS
A
A
Power Management
GM7130
3A STEP-DOWN VOLTAGE SWITCHING REGULATORS
ELECTRICAL CHARACTERISTICS: GM7130-3.3
(Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over full Operating Temperature Range)
Parameter
Output Voltage
Output Voltage - GM7130
Efficiency
6V
Conditions
V
IN
= 12V, I
LOAD
= 0.5A
V
IN
40V, 0.5A I
LOAD
3.0A
Symbol
V
OUT
V
OUT
h
Min
3.234
Typ
3.3
Max
3.366
Unit
V
V
%
3.168/
3.135
3.3 3.432/
3.465
-
V
IN
= 12V, I
LOAD
= 3.0A
75
-
ELECTRICAL CHARACTERISTICS: GM7130-5.0
(Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over full Operating Temperature Range)
Parameter
Output Voltage
Output Voltage - GM7130
Efficiency
8V
Conditions
V
IN
= 12V, I
LOAD
= 0.5A
V
IN
40V, 0.5A I
LOAD
3.0A
Symbol
V
OUT
V
OUT
h
Min
4.900
Typ
5.0
Max
5.100
Unit
V
V
%
4.800/
4.750
5.0 5.200/
5.250
-
V
IN
= 12V, I
LOAD
= 3.0A
77
-
ELECTRICAL CHARACTERISTICS: GM7130-12
(Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over full Operating Temperature Range)
Parameter
Output Voltage
Output Voltage - GM7130
Efficiency
15V
Conditions
V
IN
= 25V, I
LOAD
= 0.5A
V
IN
40V, 0.5A I
LOAD
3.0A
V
IN
= 15V, I
LOAD
= 3.0A
Symbol
V
OUT
V
OUT
h
Min
11.76
Typ
12.0
Max
12.24
Unit
V
V
%
11.52/
11.40
12.0 12.48/
12.60
-
88
-
ELECTRICAL CHARACTERISTICS: GM7130-15
(Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over full Operating Temperature Range)
Parameter
Output Voltage
Output Voltage - GM7130
Efficiency
Conditions
V
IN
= 25V, I
LOAD
= 0.5A
18V V
IN
40V, 0.5A I
LOAD
3.0A
V
IN
= 18V, I
LOAD
= 3.0A
Symbol
V
OUT
V
OUT
h
Min
14.70
Typ
15.0
Max
15.30
Unit
V
V
%
14.40/14.25
15.0 15.60/
15.75
-
88
-
GM7130
4
MICROELECTRONICS
A
A
Power Management
GM7130
3A STEP-DOWN VOLTAGE SWITCHING REGULATORS
ELECTRICAL CHARACTERISTICS: GM7130-ADJ
(Specifications with standard type face are for T
J
= 25°C, and those with
boldface type
apply over full Operating Temperature Range)
Parameter
Feedback Voltage
Feedback Voltage - GM7130
Efficiency
Conditions
V
IN
= 12V, I
LOAD
= 0.5A, V
OUT
= 5V
8V V
IN
40V, 0.5A I
LOAD
3.0A
V
OUT
= 5V
V
IN
= 12V, I
LOAD
= 3A, V
OUT
=5V
Symbol
V
OUT
V
OUT
h
Min
1.217
Typ
1.230
Max
1.243
Unit
V
V
%
1.193/1.180 1.230 1.267/1.280
-
77
-
ELECTRICAL CHARACTERISTICS: All Output Voltage Versions
(Specifications with standard type face are for T
J
= 25 C, and those with
boldface type
apply over full Operating Temperature Range. Unless otherwise
specified, V
IN
= 12V for the 3.3V, 5.0V and ADJ version, V
IN
= 25V for 12V version. and V
IN
= 30V for 15V version. I
LOAD
= 500 mA)
Parameter
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
Output Leakage Current
Quiescent Current
Standby Quiescent Current
Conditions
V
OUT
= 5V (Adjustable Version Only)
(Note 11)
I
OUT
= 3A (Notes 4)
(Note 5)
(Note 4, 11)
(Notes 6, 7)
Output = -1 V
Output = -1V
Symbol
I
b
f
o
V
SAT
DC
I
CL
I
L
I
Q
I
STBY
q
JA
q
JA
q
JC
q
JA
V
IH
V
IL
I
IH
I
IL
Min
-
47 /
42
-
93
4.2 /
3.5
-
-
-
-
-
-
-
-
2.2 /
2.4
-
-
-
Typ
50
52
1.4
98
5.8
-
7.5
5
50
65
45
2
50
1.4
1.2
12
0
Max
100 /
500
58 /
63
1.8 /
2.0
-
6.9 /
7.5
2
30
10
200
-
-
--
-
-
1.0 /
0.8
30
10
Unit
nA
kHz
V
%
A
mA
mA
µA
(Note 6)
ON/OFF Pin = 5V (OFF)
TO-220 Package, Junction to Ambient (Note 8)
Thermal Resistance
TO-220 Package, Junction to Ambient (Note 9)
TO-220,TO-263 Package, Junction to Case
TO-263 Package, Junction to Ambient (Note 10)
°C/W
ON/OFF Pin
Logic Input Level
V
OUT
=0V
V
OUT
= Nominal Output Voltage
ON/OFF Pin = 5V (OFF)
V
V
µA
µA
ON/OFF Pin Input Current
ON/OFF Pin = 0V (ON)
GM7130
5
GM 431
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