GAMMA GM7130

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
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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
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