GM7130HV
3A STEP DOWN VOLTAGE SWITCHING
REGULATORS
Description
GM7130HV 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.
GM7130HV 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 GM7130HV is high-efficiency replacements
for popular
three-terminal linear regulators, and is
requiring a smaller heat sink or even no need
heat sink.
GM7130HV 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.
Features
3.3V, 5V, 12V and Adjustable output
versions
Adjustable version output voltage range
1.23V to 57V
V
OUT
accuracy is up to
±
2% under
specified input voltage the output load
conditions
Input voltage range up to 60V
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
GM7130HV operates at a switching frequency of
52 kHz which
allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM7130HV series are available in a standard 5-
lead TO-220, TO220B and TO263 packages.
Preliminary
Information
On-card/board switching regulators
Positive to negative converter (buck-boost)
Application
Pre-regulator for linear regulators
High-efficiency step-down buck regulator
Typical Application Circuits
GM7130HV-5.0
Feedback
4
1
V
IN
Output
5
C
IN
100µF
GND
3
ON/OFF
5
D1
1N5822
L1
100µH
5V
regulated
outpu
t,
C
OUT
680µF
www.gammamicro.com.tw
GM7130HV
V2.00
1
7V – 40V
Unregulated
DC Input
GM7130HV
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
Storage Temperature Range
Maximum Junction Temperature
Operating Temperature Range
Minimum EDS Rating (Note 2)
Lead Temperature (Soldering, 10 sec)
Value
63
-0.3 + V
IN
+ 0.3
-0.3 + V
IN
+ 0.3
-1.0
Internally Limited
- 65 to 150
+ 150
- 40 to 125
2
+ 260
Unit
V
V
V
V
-
°C
°C
℃
kV
°C
Block Diagram
FB
4
R2*
Preliminary
Information
V
IN
1
Error
Amplifier
Comparator
Driver
1.23V
Reference
52KHz
Oscillator
Thermal Shutdown
&
Current Limit
Reset
Regulator
With
Enable
5
ON/OFF
R1
1.0K
3
Gnd
2
V
OUT
V
OUT
= 3.3V, R2 = 1.7K
V
OUT
= 5.0V, R2 = 3.1K
V
OUT
= 12V, R2 = 8.84K
V
OUT
= ADJ, R1 = OPEN, R2 = 0Ω
GM7130HV
V2.00
4
GM7130HV
3A STEP DOWN VOLTAGE SWITCHING
REGULATORS
Electrical Characteristics: GM7130HV-ADJ
(Specifications with standard type face are for T
J
= 25℃, and those with
bold face
type apply over full Operating Temperature
rage
)
Parameter
Feedback
Voltage
Condition (Note 3)
V
IN
= 12V, I
LOAD
= 0.5A, V
OUT
= 5V,
Circuit of Fig 2.
8.0V
<
V
IN
<
60V, 0.5A
<
I
LOAD
<
3A,
V
OUT
= 5V,
Circuit of Fig 2.
V
IN
=12V, I
LOAD
=3.0A, V
OUT
= 5V
Symbol
Min
1.217
Typ
Max
1.243
Unit
V
OUT
1.193
1.180
1.230
1.267
1.280
V
Efficiency
η
77
%
Electrical Characteristics: GM7130HV-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 (Note 3)
V
IN
= 12V, I
LOAD
= 0.5A, Circuit of Fig 2.
Symbol
Min
3.234
Typ
Max
3.366
Unit
Output Voltage
6V
<
V
IN
<
60V, 0.5A
<
I
LOAD
<
3A,
Circuit of Fig 2
V
IN
=12V, I
LOAD
=3.0A
V
OUT
3.168
3.135
3.300
3.432
3.465
V
Efficiency
η
75
%
Electrical Characteristics: GM7130HV-5.0
Parameter
Condition (Note 3)
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
V
IN
= 12V, I
LOAD
= 0.5A, Circuit of Fig 2.
Output Voltage
8V
<
V
IN
<
60V, 0.5A
<
I
LOAD
<
3A,
Circuit of Fig 2.
Efficiency
V
IN
=12V, I
LOAD
=3.0A
Preliminary
Information
Symbol
Min
4.900
V
OUT
4.800
4.750
η
Typ
Max
5.100
5.200
5.250
Unit
5.000
V
77
%
Electrical Characteristics: GM7130HV-12
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
Parameter
Condition (Note 3)
V
IN
= 25V, I
LOAD
= 0.5A, Circuit of Fig 2.
Symbol
Min
11.76
Typ
Max
12.24
Unit
Output Voltage
15V
<
V
IN
<
60V, 0.5A
<
I
LOAD
<
3A,
Circuit of Fig 2.
V
IN
=15V, I
LOAD
=3.0A
V
OUT
11.52
11.40
12.00
12.48
12.60
V
Efficiency
η
88
%
GM7130HV
V2.00
5
Microcontroller MCU
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