g5207 - datasheet
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7/21/2019 G5207 - Datasheet
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Ver: 1.4Jul 18, 2011
TEL: 886-3-5788833http://www.gmt.com.tw
1
G5207 Global Mixed-mode Technology Inc.
24V Input Voltage-Mode Buck PWM Controller Features Drives Two N-Channel MOSFETs
Operates at 5V Supply Voltage
Voltage-Mode PWM Control Fast Transient Response
0.8V, 2% Accuracy Reference Voltage
Internal Soft Start
Constant 300kHz Switching Frequency
Over-Current Fault Monitors by Using
Low-Side MOSFET RDS(ON)
Output Under-Voltage Protection
Applications 16V to 30V Input High Power DC-DC Regulators Low-Voltage Distributed Power Supplies
General DescriptionThe G5207 provides complete control and protection
for a DC-DC converter for high power applications. It
is designed to drive two N-channel MOSFETs in asynchronous-rectified buck topology. The G5207 inte-
grates all of the control, and protection functions into a
single package.
The G5207 provides simple, single feedback loop,
voltage-mode control with fast transient response. It
includes a 300KHz free-running triangle-wave oscilla-
tor. The error amplifier features a 15MHz gain-band-
width product which provides high converter band-
width for fast transient performance. The resulting
PWM duty ratio ranges from 0% to 80%. The refer-
ence voltage is 0.8V, 2% accuracy.
The G5207 has internal soft start and executes cy-
cle-by-cycle current limit during soft start interval. The
G5207 monitors the current by using the RDS(ON) of the
low-side MOSFET which eliminates the need for a
current sensing resistor. The under-voltage protection
function monitors voltage at FB pin. The over-current
and under-voltage events after soft-start interval trig-
ger hiccup mode protection.
Ordering Information
ORDERNUMBER
MARKING TEMP.RANGE
PACKAGE(Green)
G5207P11U G5207 -40°C~ +85°C SOP-8
Note: P1: SOP-8
1: Bonding Code
U: Tape & Reel
Pin Configuration Typical Application Circuit
GND
8
6
5
1
2
3
4
BOOT
UGATE
LGATE
LX
OCSET
FB
VCC
SOP-8
G5207
7
BOOT
SHDN
UGATE 6µHOCSET
FB LGATE
GND
VCC
5VG5207
0.1µF
2000µF 10nF
10Ω
4.7µF
220µF
620Ω
39Ω
16~30V
ROCSET
LXVO=13.5V
GND
8
6
5
1
2
3
4
BOOT
UGATE
LGATE
LX
OCSET
FB
VCC
SOP-8
G5207
7
BOOT
SHDN
UGATE 6µHOCSET
FB LGATE
GND
VCC
5VG5207
0.1µF
2000µF 10nF
10Ω
4.7µF
220µF
620Ω
39Ω
16~30V
ROCSET
LXVO=13.5V