340kHz Synchronous Step-Down Converter - Richtek
Description
RT8250N
3A, 23V, 340kHz Synchronous Step-Down Converter
General Description
The RT8250N is a high-efficiency synchronous step-down DC/DC converter that can deliver up to 3A output current from 4.
75V to 23V input supply.
The RT8250N's current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.
Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up.
The RT8250N also provides output under voltage protection and thermal shutdown protection.
The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems.
Applications
z Industrial and Commercial Low Power Systems z Computer Peripherals z LCD Monitors and TVs z Green Electronics/Appliances z Point of Load Regulation of High-Performance DSPs,
FPGAs and ASICs.
Pin Configurations
(TOP VIEW)
BOOT VIN SW
GND
8
27
GND
36 9
45
SS EN COMP FB
Features
z 4.
75V to 23V Input Voltage Range z 3A Output Current z Integrated N-MOSFET Switches z Current Mode Control z Fixed Frequency Operation : 340kHz z Output Adjustable from 0.
925V to 20V z Up to 95% Efficiency z Programmable Soft-Start z Stable with Low-ESR Ceramic Output Capacitors z Cycle-by-Cycle Over Current Protection z Input Under Voltage Lockout z Output Under Voltage Protection z Thermal Shutdown Protection z Thermally Enhanced SOP-8 (Exposed Pad) Package z RoHS Compliant and Halogen Free
Ordering Information
RT8250N
Package Type SP : SOP-8 (Exposed Pad-Option 1)
Operating Temperature Range G : Green (Halogen Free with Commer-
cial Standard) Note :
Richtek Green products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
SOP-8 (Exposed Pad)
Typical Application Circuit
VIN 4.
75V to 23V
REN 100k
2 VIN CIN 10µFx2
7 EN
BOOT 1
RT8250N SW 3...
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