G5728 [GMT]
1MHz 1A Synchronous Step-Down Regulator;
| 型号： | G5728 |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | 1MHz 1A Synchronous Step-Down Regulator |
| 文件： | 总1页 (文件大小：77K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology
G5728
1MHz 1A Synchronous Step-Down Regulator
General Description
Features
The G5728 is a high efficiency monolithic synchronous
buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 50µA and drops to <1µA in shutdown. The 2.5V
to 6V input voltage range makes the G5728 ideally
suited for single Li-Ion battery-powered applications.
100% duty cycle provides low dropout operation, ex-
tending battery run time in portable systems. Switching
frequency is internally set at 1MHz, allowing the use of
small surface mount inductors and capacitors. The
internal synchronous switch increase efficiency and
eliminates the need for an external Schottky diode.
Built-in soft start function eliminates in-rush current
that could damage the system.
High Efficiency: Up to 93%
Low Quiescent Current: Only 50µA During Op-
eration
Internal Soft Start Function
1A Output Current
2.5V to 6V Input Voltage Range
1MHz Switching Frequency
No Schottky Diode Required
100% Duty Cycle in Dropout Operation
0.6V Reference Allows Low Output Voltages
<1µA Shutdown Current
Current Mode Operation for Excellent Line and
Load Transient Response
Over Temperature Protected
RoHS Compliant
Applications
Cellular Telephones
Personal Information Appliances
Microprocessors and DSP Core Supplies
Wireless and DSL Modems
Digital Still and Video Cameras
MP3 Players
Portable Instruments
Ordering Information
ORDER
NUMBER
G5728TO1U
G5728T11U
OUTPUT
VOLTAGE
Adjustable
Adjustable
TEMP.
PACKAGE
(Green)
MARKING
RANGE
5728x
5728x
-40°C~ +85°C
-40°C~ +85°C
TSOT-23-5
SOT-23-5
Note: TO:TSOT-23-5 T1:SOT-23-5
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
G5728
2.2µH
G5728
4
1
3
5
VIN
4~6V
VOUT
LX
VIN
3.3V
300mA
1
2
3
5
4
EN
GND
LX
VFB
VIN
C
FB* (option)
CIN
2.2µF
CER
COUT
10µF
CER
EN
VFB
R1
82k
GND
2
R2
18k
R1
R2
TSOT-23-5/SOT-23-5
VOUT = 0.6V × (1+
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
May 27, 2013
1
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