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G5U2596M Datasheet Preview

G5U2596M Datasheet

3A PWM Step-Down DC/DC Converter

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G5U2596M pdf
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ISSUED DATE :2005/12/26
REVISED DATE :2006/05/17C
G5U2596M
150 KHz, 3A PWM Step-Down DC/DC Converter
Description
The G5U2596M series of regulators are monolithic integrated circuit that provides all active functions for a step-down (buck) switching
regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3v, 5v,
12v and an adjustable output version. The G5U2596M series operate at a switching frequency of 150 kHz; thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-263 surface mount
package. Other feature include a guaranteed 4% to tolerance on output voltage under specified input voltages and output load conditions.
The 150 kHz 15% is on the oscillator frequency. External shutdown is included, featuring 80uA (Typ.) standby current. The output switch
includes cycle-by cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
Features
3.3V, 5.0V, 12V and adjustable output versions
Guaranteed 3A output current
Operating voltage can be up to 22V
150kHz fixed frequency internal oscillator
Built-in TTL On/Off control
TTL Shutdown Capability
Uses readily available standard inductors
Thermal shutdown and current limit protection
Applications
High-efficiency step-down regulator
One-ch switching regulators simple
Positive to negative converter
Package Dimensions
Block Diagram
REF.
A
b
L4
c
L1
E
Millimeter
Min. Max.
REF.
4.40 4.80 c2
0.66 0.91 L2
0.00 0.30 B D
0.36 0.5
e
2.29 2.79 L
9.80 10.4
Millimeter
Min. Max.
1.25 1.45
1.27 REF.
8.6 9.0
1.70 REF.
14.6 15.8
0˚ 8˚
G5U2596M
Page: 1/6



GTM
GTM

G5U2596M Datasheet Preview

G5U2596M Datasheet

3A PWM Step-Down DC/DC Converter

No Preview Available !

G5U2596M pdf
ISSUED DATE :2005/12/26
REVISED DATE :2006/05/17C
Pin Function
Pin Name
VIN
Output
Ground
Feedback(FB)
ON/OFF(SD)
Pin#
1
2
3
4
5
Function
This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor
must be present at this pin to minimize voltage transients and to supply the switching current
needed by regulator.
Internal switch. The voltage at this pin switches between (+VIN - VSAT) and approximately -0.5V,
with a duty cycle of approximately VOUT/VIN. To minimize coupling to sensitive circuitry, the PC
board copper area connected to this pin should be keep to a minimum.
Circuit ground
Senses the regulated output voltage to complete the feedback loop.
Allows the switching regulator circuit to be shutdown using logic level signals. Thus drop the total
input supply current to approximately 150 A. Pulling this pin below a threshold voltage of
approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of
18V) shuts the regulator down. If this shutdown feature is not needed, ON/OFF pin can be wired to
the ground pin.
Absolute Maximum Ratings
Parameter
Supply Voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to ground
Power Dissipation
Storage Temperature
Operating temperature
Operating Voltage
Symbol
VCC
VSD
VFB
VOUT
PD
TST
TOP
VOP
Ratings
24
-0.3 ~ +18
-0.3 ~ +18
-1
Internally Limited
-65 ~ +150
-40 ~ +125
+4.5 ~ +22
Unit
V
V
V
V
W
V
G5U2596M Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ
Output Feedback
Efficiency
VFB
5 VIN 22V, 0.2A
VOUT=3V
ILOAD
3A
1.180/1.168
1.230
VIN=12V, ILOAD=3A, VOUT=3V
74
Max
1.280/1.292
Unit
V
%
G5U2596M-33 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ
Output Feedback
Efficiency
VFB
5.5V VIN 22V
0.2A ILOAD 3A
VIN=12V, ILOAD=3A
3.168/3.135
3.3
75
Max Unit
3.432/3.465
V
%
G5U2596M-50 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ
Output Feedback
Efficiency
VFB
8V VIN 22V
0.2A ILOAD 3A
VIN=12V, ILOAD=3A
4.80/4.75
5.0
80
Max
5.20/5.25
Unit
V
%
G5U2596M-12 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ
Output Feedback
Efficiency
VFB
15V VIN 22V
0.2A ILOAD 3A
VIN=16V, ILOAD=3A
11.52/11.40
12
89
Max Unit
12.48/12.60
V
%
G5U2596M
Page: 2/6


Part Number G5U2596M
Description 3A PWM Step-Down DC/DC Converter
Maker GTM
Total Page 6 Pages
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