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DP3115 Datasheet Preview

DP3115 Datasheet

2.5A Monolithic Buck Converter

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DP3115
www.depuw.com
40V, 2.5A Monolithic Buck Converter with CC/CV Control
Rev2.2
Description
DP3115 integrates a high efficiency synchronous
step-down switching regulator, which includes a
40V, 80mΩ high side P-MOS and a 40V, 39mΩ low
side N-MOS to provide 2.5A continuous load
current over 10V to 40V wide operating input
voltage with 38V input over voltage protection.
Conductance Peak current mode control provides
fast transient responses and cycle-by-cycle
current limiting.
DP3115 has configurable line drop compensation,
configurable charging current limit. A simple
Power system with few external components is
possible with DP3115.
Applications
USB car charger
Portable charging device
General purpose USB charger
General purpose DC-DC conversion
Typical Application Schematic
Features
2.5A continuous output current capability
10V to 40V wide operating input range with input Over
Voltage Protection
Integrated 40V, 80mΩ high side and 40V, 39mΩ low
side power MOSFET switches
Up to 93% efficiency
CV Mode control (Constant voltage). 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
Configurable Switching Frequency with resistor
Over-Temperature Protection
38V input voltage protection to protect power
MOSFETs from working at high current ,high input
voltage condition
Fixed Soft start time
Under-Input Voltage Lockout.
Over-Temperature Protection
SOP-8 Package
VOUT is set by R3 and R4calculated by the following equation VOUT=1.21V*[1+(R3/R4)]
The stability of power system can be enhanced when using C5.
DEVELOPER MICROELECTRONICS




DEVELOPER MICROELECTRONICS

DP3115 Datasheet Preview

DP3115 Datasheet

2.5A Monolithic Buck Converter

No Preview Available !

40V, 2.5A Monolithic Buck Converter with CC/CV Control
Pin Configuration and Functions
SOP-8 Package (Top View)
DP3115
Rev2.2
Pin
Number
Name
1 FB
2 RT
3 ILIM
4 VIN
5 SW
6
7
GND
8
Description
Feedback Input PIN. 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. It is better to connect
a 200pF ceramic capacitor between FB pin and VOUT.
Resistor to set scillation frequency.Connect to GND. Keep RT away from SW
Resistor to set Ipeak of inductance. Connect to GND. Keep ILIM away from SW
Power Input PIN. Vin supplies the power to the IC. Supply Vin with a 10V to 40V 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
Absolute Maximum Ratings(Note1)
Input Voltages
PARAMETER
VIN to GND
VRT to GND
VILIM to GND
VFB to GND
VSW to GND
MIN
MAX
Unit
-0.3 40 V
-0.3 6 V
-0.3 6 V
-0.3 6 V
-0.3
VIN+1
V
Handling Ratings
PARAMETER
TST
TJ
TL
DEFINITION
Storage Temperature Range
Junction Temperature
Lead Temperature
MIN
-65
DEVELOPER MICROELECTRONICS
MAX
150
150
260
Unit
°C
°C
°C


Part Number DP3115
Description 2.5A Monolithic Buck Converter
Maker DEVELOPER MICROELECTRONICS
Total Page 10 Pages
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