G5719C [GMT]
1MHz, 3A Synchronous Step-Down Regulator;
| 型号： | G5719C |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | 1MHz, 3A Synchronous Step-Down Regulator |
| 文件： | 总1页 (文件大小：81K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
G5719C
Global Mixed-mode Technology
1MHz, 3A Synchronous Step-Down Regulator
General Description
Features
The G5719C is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, cur-
rent mode architecture. Supply current during opera-
tion is only 50µA and drops to <1µA in shutdown. The
2.5V to 6V input voltage range makes the G5719C
ideally suited for single Li-Ion battery-powered applica-
tions. 100% duty cycle provides low dropout operation,
extending battery run time in portable systems.
Switching frequency is internally set at 1MHz, allowing
the use of small surface mount inductors and capaci-
tors. The internal synchronous switch increase effi-
ciency and eliminates the need for an external Schot-
tky diode. Built-in soft start function eliminates in-rush
current that could damage the system. Output latch-off
operation protects the step-down regulator from dam-
age under short circuit and overvoltage conditions.
High Efficiency: Up to 95%
Low Quiescent Current: Only 50µA During Op-
eration
Internal Soft Start Function
Output Current
G5719CTB1U: 2A Continuous, 3A Peak
G5719CRC1U: 3A Continuous
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
Power Good
Output Short Circuit Latch-off Protection
Output Overvoltage Latch-off Protection
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
TEMP.
RANGE
PACKAGE
(Green)
OUTPUT
VOLTAGE
MARKING
NUMBER
G5719CTB1U
G5719CRC1U
519Cx
519C
Adjustable
Adjustable
-40°C to +85°C
-40°C to +85°C
SOT-23-6
TDFN2X2-8
Note: TB: SOT-23-6
1: Bonding Code
U: Tape & Reel
RC: TDFN2X2-8
Pin Configuration
Typical Application Circuit
R
10k
G5719C
VIN
VIN
4~6V
G5719C
PG
G5719C
VIN
2.2µH
VOUT
3.3V
2A
8
VFB
GND
1
2
1
2
3
6
5
4
VFB
PG
EN
GND
LX
LX
C
FB* (option)
PG
7
6
EN
LX
CIN
2.2µF
CER
Thermal
Pad
COUT
10µF
CER
VIN
3
EN
VIN
VFB
GND
4
5
NC
GND
R1
82k
SOT-23-6
R2
18k
TDFN2X2-8
R1
R2
VOUT = 0.6V × ( 1+
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.1
Feb 20, 2014
1
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