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DP3119B Datasheet Preview

DP3119B Datasheet

3.1A Monolithic Buck Converter

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DP3119B
www.depuw.com
36V, 3.1A Monolithic Buck Converter with CC/CV Control
Rev1.0
Description
Features
DP3119B integrates a high efficiency
synchronous step-down switching regulator,
which includes a 36V, 76mΩ high side and a 36V,
52mΩ low side MOSFETs to provide 3.1A
continuous load current over 6.5V to 36V wide
operating input voltage with 33V input over
voltage protection. Peak current mode control
provides fast transient responses and
cycle-by-cycle current limiting.
DP3119B has configurable line drop
compensation, configurable charging current limit.
CC/CV mode control provides a smooth transition
between constant current charging and constant
voltage charging stages. Built-in soft-start
prevents inrush current at power-up.
Applications
USB car charger
Portable charging device
General purpose USB charger
General purpose DC-DC conversion
3.1A continuous output current capability
6.5V to 36V wide operating input range with input
Over Voltage Protection
Integrated 36V, 76mΩ high side and 36V, 52mΩ low
side power MOSFET switches
Up to 95% efficiency
CV/CC Mode control (Constant voltage and constant
current). Cycle-by-Cycle Current Limiting
Configurable Line Drop Compensation with resistor
Internal Soft-Start limits the inrush current at turn-on
Internal compensation to save external components
Stable with Low ESR Ceramic Output Capacitors
Fixed 100KHz Switching Frequency
Over-Temperature Protection
33V input voltage protection to protect power
MOSFETs from working at high current ,high input
voltage condition
Soft start time is programmable using external
capacitor
Input Under-Voltage Lockout. Output Over-Voltage
Protection
Over-Temperature Protection
Pulse skip mode at light load to improve light load
efficiency
Thermally Enhanced ESOP-8 Package
Typical Application Schematic
DEVELOPER MICROELECTRONICS




DEVELOPER MICROELECTRONICS

DP3119B Datasheet Preview

DP3119B Datasheet

3.1A Monolithic Buck Converter

No Preview Available !

36V, 3.1A Monolithic Buck Converter with CC/CV Control
Efficiency
DP3119B
Rev1.0
Pin Configuration and Functions
ESOP-8 Package (Top View)
Pin
Number
Name
1 BST
2 VIN
3 SW
4 GND
5 FB
6 IADJ
7 EN
8 SS
9 EPAD
Description
Boot-Strap pin. Connect a 0.1μF or greater capacitor between SW and BST to power the high side gate
driver.
Power Input. Vin supplies the power to the IC. Supply Vin with a 4.5V to 36V power source. Bypass Vin to
GND with a large capacitor and at least another 0.1uF ceramic capacitor to eliminate noise on the input to
the IC. Put the capacitors close to Vin and GND pins.
Power Switching pin. Connect this pin to the switching node of inductor.
Ground
Feedback Input. FB senses the output voltage. Connect FB with a resistor divider connected between the
output and ground. FB is a sensitive node. Keep FB away from SW and BST pin. It is better to connect a
47pF ceramic capacitor between FB pin and GND pin.
Connect a resistor between IADJ and GND to configure load current limit and line drop compensation.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on
the regulator; low to turn it off. EN is pulled to VIN internally by a large resistor.
This pin is used to program soft-start time, connect a cap to program soft-start time.
EPAD is connected to GND internally. EPAD must be connected to GND on PCB board to
get full power.
DEVELOPER MICROELECTRONICS


Part Number DP3119B
Description 3.1A Monolithic Buck Converter
Maker DEVELOPER MICROELECTRONICS
Total Page 15 Pages
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