GM7230-12B5BT [GAMMA]
150KHz, 3A STEP DOWN VOLTAGE SWITCHING REGULATORS; 为150KHz ， 3A降压电压开关调节器
| 型号： | GM7230-12B5BT |
| 厂家： | 
GAMMA MICROELECTRONICS INC. |
| 描述： | 150KHz, 3A STEP DOWN VOLTAGE SWITCHING REGULATORS |
| 文件： | 总10页 (文件大小：151K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Description
Features
GM7230 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 2A line and load regulations. GM7230 is
available in fixed output voltages of 3.3V, 5V,
and a versatile Adjustable output version.
3.3V, 5V, 12Vand Adjustable output
versions
Adjustable version output voltage range
1.23V to 37V
V
OUT accuracy is to ±2% under specified
input voltage the output load conditions
These regulators are simple to use and require
minimum number of external components. The
features include internal frequency compensation
and a fixed-frequency oscillator.
Input voltage range up to 40V
Requires only 4 external components with
High efficiency
The GM7230 is high-efficiency replacements for
popular three-terminal linear regulators, and is
requiring a smaller heat sink or even no need
heat sink.
TTL shutdown capability, low power
standby mode
Built-in thermal shutdown, current limit
protection
GM7230 performs well with standard inductors
from most of manufacturers, and simplifying the
design of switch-mode power supplies. External
shutdownis included with 80µA (typical) standby
current. The output switch has cycle-by-cycle
current limiting as well as thermal shutdown for
full protection under fault conditions.
Uses standard inductors
150 kHz fixed frequency internal oscillator
GM7230 operates at a switching frequency of
150 kHz which allowing smaller size filter
components than what would be needed with
lower frequency switching regulators.
GM7230 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
Positive to negative converter (buck-boost)
LCD Monitors
High-efficiency step-down buck regulator
Typical Application Circuits
GM7230-5.0
4
Feedback
Unregulated
DC Input
5V
1
VIN
L1
regulated
68µH
output,
Output
2
GND
3
ON/OFF
CIN
680µF
5
COUT
D1
220µF
1N5824
www.gammamicro.com.tw
1
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Marking Information and Pin Configurations (Top View)
TO-220-5
TO-220B-5
TO-263-5
GM7230
VVAYWW
GM7230
VVAYWW
GM7230
VVAYWW
VV: Voltage suffix (15 = 1.5V, 50 = 5.0V…A = Adj)
A: Assembly / Test site code
Y: Year
WW: Week
2
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Ordering Information
Ordering Number
GM7230-ATA5T
GM7230-ATA5R
GM7230-ATB5T
GM7230-ATB5BT
GM7230-3.3TA5T
GM7230-3.3A5R
GM7230-3.3B5T
GM7230-3.3B5BT
GM7230-5.0TA5T
GM7230-5.0A5R
GM7230-5.0B5T
GM7230-12B5BT
GM7230-12TA5T
GM7230-12A5R
GM7230-12B5T
GM7230-12B5BT
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
Adj
3.3
5.0
12
3
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Absolute Maximum Ratings (Note 1)
Rating
Value
45
Unit
Maximum Supply Voltage
SD Pin Input Voltage / Feed Back Pin Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
V
V
V
-
-0.3 + VIN + 0.3
-0.3 + VIN + 0.3
Internally Limited
Thermal Resistance – Junction to Ambient (θJA)
** 2 square inch of FR-4, double sided, 1oz. minimum copper weight, is
recommended
36
℃/W
Storage Temperature Range
- 65 to 150
+ 150
℃
℃
℃
kV
℃
Maximum Junction Temperature
Operating Temperature Range
Minimum EDS Rating (Note 2)
Lead Temperature (Soldering, 10 sec)
- 40 to 125
2
+ 260
Block Diagram
SD
VIN
Current
2.5V
1.235V
Start UP
Source
Bias
Reference
220
Reference
220mV
COMP
Current
Limit
2.5V
COMP
2A
Switch
GM
R2
AMP
COMP
Latch
Reset
Driver
R1 = 2.5K
Thermal
Limit
OUTPUT
GND
Freq. Shift
For 3.3V, R2 = 4.2K
For 5.0V, R2 = 7.6K
For Adj, R2 = 0 and R1 = OPEN
150KHz
OSC
4
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Electrical Characteristics: GM7230-ADJ
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
Parameter
Output Voltage
Efficiency
Condition
Symbol
VOUT
η
Min
Typ
1.230
88
Max
Unit
V
1.193
1.180
1.267
1.280
4.5V < VIN < 40V, 0.2A < ILOAD < 2A
VIN =12V, ILOAD=2.0A, VOUT = 3V
%
Electrical Characteristics: GM7230-3.3
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
Parameter
Output Voltage
Efficiency
Condition
Symbol
VOUT
η
Min
Typ
3.300
73
Max
Unit
V
3.168
3.135
3.432
3.465
4.75V < VIN < 40V, 0.2A < ILOAD < 2A
VIN =12V, ILOAD=2.0A
%
Electrical Characteristics: GM7230-5.0
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
Parameter
Output Voltage
Efficiency
Condition
Symbol
VOUT
η
Min
Typ
5.000
80
Max
Unit
V
4.800
4.7500
5.200
5.250
7V < VIN < 40V, 0.2A < ILOAD < 2A
VIN =12V, ILOAD=2.0A
%
Electrical Characteristics: GM7230-12
(Specifications with standard type face are for T = 25℃, and those with bold face type apply over full Operating Temperature
rage)
Parameter
Output Voltage
Efficiency
Condition
Symbol
VOUT
η
Min
11.52
11.40
Typ
12.00
88
Max
12.48
12.60
Unit
V
15V < VIN < 40V, 0.5A < ILOAD < 3A
VIN =15V, ILOAD=3.0A
%
5
GM7230
150KHz, 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)
Parameter
Condition
Symbol
Min
Typ
Max
Unit
50
Feedback Bias
Current
VFB =1.3V (Adjustable Version Only)
Ib
-
10
nA
100
173
173
127
Oscillator
(Note 6)
fo
150
kHz
V
Frequency
110
1.4
Saturation
Voltage
IOUT = 2A (Notes 7, 8)
VSAT
DC
-
1.16
1.5
Max Duty Cycle
(ON)
(Note 8)
(Note 9)
100
0
-
%
%
Min Duty Cycle
(OFF)
DC
lCL
Current Limit
Peak Current (Notes 7, 8)
Output =0V (Notes 7, 9, 10)
Output = -0.9V (Note 10)
3.4
A
-
-
-
100
µA
mA
Output Leakage
Current
lL
lQ
2
-
Quiescent
Current
Standby
Quiescent
Current
(Note 9)
-
-
5
-
mA
SD Pin = 5V (OFF), Note 10
lSTBY
70
200
µA
Low (ON)
VIH
VIL
IH
-
1.3
1.3
5
0.6
-
SD Pin Logic
lnput Level
V
High (OFF)
2.0
VLOGlC = 2.5V (OFF)
VLOGlC = 0.5V (ON)
15
5
µA
µA
SD Pin lnput
Current
IL
0.02
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating
Ratings indicate conditions for which the device is intended to be functional, but do not
guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical
Characteristics.
Note 2: The human body model is a 100pF capacitor discharged through a 1.5K
Note 3: Typical numbers are at 25°C and represent the most likely norm.
Ωresistor into each pin.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type
face). All room temperature limits are 100% production tested. All limits at temperature extremes are
guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to
calculate Average Outgoing Quality Level (AOQL).
Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage
programming resistors can affect switching regulator system performance. When the GM7230 is used as
shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of
Electrical Characteristics.
Note 6: The switching frequency is reduced when the second stage current limit is activated.
Note 7: No diode, inductor or capacitor connected to output pin.
Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version.
6
GM7230
150KHz, 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 GM7230, to keep the sensitive feedback wiring short.
4
Feedback
1
L1
GM7230-x.x
68µH
VIN
VOUT
2
D1
VOUT
ON/OFF
3
5
CIN
100µF
L
COUT
GND
VIN
O
A
D
680µF
Unregulatedd
DC Input
Figure 1 Fixed Ouput Votlage Versions
CIN = 470µF, Aluminum Electrolytic
COUT = 220µF, 25V, Aluminum Electrolytic
D1 = Schottky, 5A/40V
L1 = 68µH
4
Feedback
L1
1
GM7230-A
68µH
VOUT
VIN
2
VOUT
R2
5
3
L
VIN
CIN
100µF
ON/OFF
GND
O
A
D
D1
Unregulatedd
DC Input
COUT
R1
680µF
Figure 2 Adjustable Ouput Votlage Versions
CIN = 470µF, Aluminum Electrolytic
COUT = 220µF, 25V, Aluminum Electrolytic
D1 = Schottky, 5A/40V
L1 = 68µH
VOUT = VREF (1 + R2/R1)
7
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Typical Performance Characteristics
Figure 3. Switch Saturation Voltage
Figure 4. Switch Current Limit
1.4
5.5
VlN
=12V
VlN = 12V
1.3
VOUT =5
V
1.2
1.1
5.0
4.5
TJ = - 40°C
1.0
0.9
0.8
4.0
3.5
25°
125
°C
C
0.7
0.6
-50
-25
0
25
50 75 100 125
2
1
0
3
4
JUNCTlON TEMPERATURE (°C)
SWlTCH CURRENT (A)
Figure 6. Operating Quiescent Current
24
Figure 5. Dropout Voltage
1.6
1.4
1.2
1.0
0.8
0.6
L = 33µH
4.5V < VIN < 40V
RIND = 0.04
20
16
12
8
I
SWITCH = 0
VOUT = VREG = 50mV
Switch ON
I
LOAD = 2A
I
LOAD = 1A
Switch OFF
4
0
-50 -25
0
25 50 75 100 125
-50 -25
0
25 50 75 100
JUNCTION TEMPERATURE (°C)
JUNCTION TEMPERATURE (°C)
Figure 7. Shutdown Quiescent Current
Figure 8. Minimum Operating Supply Voltage
150
5
VON/OFF = 5V
100
4
3
2
TJ = 25°C
80
TJ = -40°C and 125°C
60
40
20
0
1
VOUT = 1.23V
ILOAD = 120mA
0
0
10
20
30
40
-50 -25
0
25 50 75 100 125
SUPPLY VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
Figure 9. SD Pin Current (Sinking)
8
Figure 10. Switching Frequency
160
VIN = 40V
7
6
5
4
3
2
155
TJ = -40°C and 125°C
150
145
140
135
130
120
1
0
-50 -25
0
25 50 75 100 125
0
5
10
15
20
25
JUNCTION TEMPERATURE (°C)
SD PlN VOLTAGE(V)
8
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Package Outline Dimensions – TO-263-5
0.176 - 0.184
(4.47 - 4.67)
0.389 - 0.408
(9.88 - 10.18)
0.046 - 0.054
(1.17 - 1.37)
0.061 - 0.069
(1.56 - 1.76)
0.322 - 0.339
(8.20 - 8.60)
0.596 - 0.612
(15.14 - 15.54)
0.028 - 0.036
(0.71 - 0.91)
3
7
0.200 - 0.216
(5.08 - 5.48)
0.092 - 0.108
(2.34 - 2.74)
o
o
0 - 8
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
0.175 - 0.185
(4.45 - 4.75)
(0.38 + 0.18)
(0.38 - 0.03)
0.100 - 0.120
(2.54 - 3.05)
0.240 - 0.260
(6.10 - 6.60)
0.149 - 0.153
(3.78 - 3.89)
0.330 - 0.350
(8.38 - 8.89)
0.525 - 0.555
(13.34 - 14.10)
0.525 - 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
(0.38 + 0.18)
(2.67 + 0.25)
(0.38 - 0.03)
(2.67 - 0.38)
9
GM7230
150KHz, 3A STEP DOWN VOLTAGE
SWITCHING REGULATORS
Ordering Number
G
M 7230 A
TA5
R
APM Gamma Circuit Type
Output Voltage
Package Type
Shipping Type
Micro
A: Adj
TA5: TO263-5
R: Taping & Reel
T: Tube
3.3 = 3.3V
5.0 = 5.0V
12 = 12.0V
TB5: TO-220-5
TB5B: TO-220B-5
8
10
10
6
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