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G5719C Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc

Part # G5719C
Description  1MHz, 3A Synchronous Step-Down Regulator
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Manufacturer  GMT [Global Mixed-mode Technology Inc]
Direct Link  http://www.gmt.com.tw
Logo GMT - Global Mixed-mode Technology Inc

G5719C Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc

  G5719C Datasheet HTML 1Page - Global Mixed-mode Technology Inc  
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Ver: 0.1
Feb 20, 2014
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G5719C
Global Mixed-mode Technology
1MHz, 3A Synchronous Step-Down Regulator
Features
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
General Description
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.
Ordering Information
ORDER
NUMBER
MARKING
OUTPUT
VOLTAGE
TEMP.
RANGE
PACKAGE
(Green)
G5719CTB1U
519Cx
Adjustable
-40°C to +85°C
SOT-23-6
G5719CRC1U
519C
Adjustable
-40°C to +85°C
TDFN2X2-8
Note: TB: SOT-23-6
RC: TDFN2X2-8
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
VIN
LX
EN
VFB
GND
G5719C
C
IN
2.2µF
CER
V
IN
4~6V
2.2µH
C
FB
R1
82k
R2
18k
C
OUT
10µF
CER
V
OUT
3.3V
2A
* (option)
V
OUT = 0.6V × ( 1+
)
R1
R2
VFB
VIN
SOT-23-6
6
4
1
EN
2
3
GND
LX
G5719C
PG
5
R
10k
PG
V
IN
TDFN2X2-8
1
2
3
4
8
7
6
5
Thermal
Pad
G5719C
1
2
3
4
8
7
6
5
Thermal
Pad
VFB
PG
VIN
GND
GND
EN
LX
NC
VIN
LX
EN
VFB
GND
G5719C
C
IN
2.2µF
CER
V
IN
4~6V
2.2µH
C
FB
R1
82k
R2
18k
C
OUT
10µF
CER
V
OUT
3.3V
2A
* (option)
V
OUT = 0.6V × ( 1+
)
R1
R2
VFB
VIN
SOT-23-6
6
4
1
EN
2
3
GND
LX
G5719C
PG
5
R
10k
PG
V
IN
TDFN2X2-8
1
2
3
4
8
7
6
5
Thermal
Pad
G5719C
1
2
3
4
8
7
6
5
Thermal
Pad
VFB
PG
VIN
GND
GND
EN
LX
NC


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