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G5796A データシート PDF ( 特性, スペック, ピン接続図 )

部品番号 G5796A
部品説明 500kHz 2A/3A Synchronous Step-down DC/DC
メーカ Global Mixed-mode Technology
ロゴ Global Mixed-mode Technology ロゴ 

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G5796A Datasheet, G5796A PDF,ピン配置, 機能
Global Mixed-mode Technology
G5796/G5796A
G5797/G5797A
500kHz 2A/3A Synchronous Step-down DC/DC
Features
„ 2A/3A Output Current
„ 0.1Ω Internal Power MOSFET Switch
„ Stable with Low ESR Output Ceramic Capaci-
tors
„ Up to 95% Efficiency
„ 32µA Shutdown Mode
„ Fixed 500kHz Frequency
„ Thermal Shutdown
„ Cycle-by-Cycle Over Current Protection
„ Wide 4.5V to 24V Operating Input Range
„ Output Adjustable from 0.92V to 21.6V
„ Available in SOP-8/SOP-8 (FD) Package
„ Build in skip mode at light loading in
G5796A/G5797A
Applications
„ DSL Modems
„ Distributed Power Systems
„ Pre-Regulator for Linear Regulators
General Description
The G5796/G5797 is a monolithic step-down switch
mode regulator with a built in internal power MOSFET. It
achieves 2A/3A continuous output current over a wide
input supply range with excellent load and line regulation.
Current mode operation provides fast transient re-
sponse and eases loop stabilization.
Provide skip mode in G5796A/G5797A. When loading
too light clock skip several cycle proportional to load.
Fault condition protection includes cycle-by-cycle cur-
rent limiting, output short circuit protection and thermal
shutdown. In shutdown mode the regulator draws
32µA of supply current. Programmable soft-start over-
writes the internal soft-start for various requirement of
output power up ramp and minimizes the inrush supply
current at initial startup.
The G5796/G5797 requires a minimum number of
readily available standard external components. It is
available in a SOP-8/SOP-8 (FD) package.
Ordering Information
ORDER
NUMBER
G5796P11U
MARKING
G5796
G5796AP11U
G5797F11U
G5797AF11U
G5796A
G5797
G5797A
Note: P1: SOP-8 F1: SOP-8 (FD)
1: Bonding Code
U : Tape & Reel
Pin Configuration
G5796/G5796A
BS 1
8 SS
IN 2
7 EN
LX 3
6 COMP
GND 4
SOP-8
5 FB
G5797/G5797A
BS 1
8 SS
IN 2
LX 3
Thermal
Pad
7 EN
6 COMP
GND 4
5 FB
SOP-8 (FD)
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
Ver: 0.6
Aug 05, 2013
LIGHT LOAD
PWM MODE
SKIP MODE
PWM MODE
SKIP MODE
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8
SOP-8
SOP-8 (FD)
SOP-8 (FD)
Typical Application Circuit
INPUT
4.5V to 24V
C1
10µF/35V
CERAMIC
x2
C4
0.1µF
C5
0.1µF
R4
100kΩ 2
7 IN
EN
1
BS
LX
3
G5796/G5796A
8 SS
FB 5
GND
COMP
46
C6
OPEN
C3
3.9nF
R3
6.8kΩ
L1
4.7µH
R1
26.1kΩ
1%
R2
10kΩ
1%
OUTPUT
3.3V/2A
C2
22µF/35V
CERAMIC
INPUT
4.5V to 24V
C1
10µF/35V
CERAMIC
x2
C4
0.1µF
C5
0.1µF
R4
100kΩ 2
7
IN
EN
1
BS
LX
3
G5797/G5797A
8 SS
FB 5
GND
COMP
46
C6
OPEN
C3
3.9nF
R3
6.8kΩ
L1
4.7µH
R1
26.1kΩ
1%
R2
10kΩ
1%
OUTPUT
3.3V/3A
C2
22µF/35V
CERAMIC
TEL: 886-3-5788833
http://www.gmt.com.tw
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