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PDF G5719C Data sheet ( Hoja de datos )
| Número de pieza | G5719C | |
| Descripción | 3A Synchronous Step-Down Regulator | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Global Mixed-mode Technology
G5719C
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
G5719CTB1U
519Cx
G5719CRC1U
519C
Note: TB: SOT-23-6 RC: TDFN2X2-8
1: Bonding Code
U: Tape & Reel
Pin Configuration
OUTPUT
VOLTAGE
Adjustable
Adjustable
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOT-23-6
TDFN2X2-8
Typical Application Circuit
G5719C
EN 1
6 VFB
GND 2
5 PG
LX 3
4 VIN
SOT-23-6
G5719C
VFB 1
PG 2
VIN 3
GND 4
Thherrmall
PPaadd
8 GND
7 EN
6 LX
5 NC
TDFN2X2-8
VIN
4~6V
CIN
2.2µF
CER
G5719C
VIN PG
LX
EN
GND VFB
VOUT = 0.6V × ( 1+
R1
R2
)
R
10k
2.2µH
VIN
CFB* (option)
R1
R2 82k
18k
VOUT
3.3V
2A
COUT
10µF
CER
Ver: 0.1
Feb 20, 2014
TEL: 886-3-5788833
http://www.gmt.com.tw
1
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| Páginas | Total 1 Páginas | |
| PDF Descargar | [ Datasheet G5719C.PDF ] | |
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