The RT7237A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7237A'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 RT7237A 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. The RT7237A is available in an SOP-8 (Exposed Pad) package.
Features
±1.5% High Accuracy Feedback Voltage
4.5V to 18V Input Voltage Range
Integrated N-MOSFET Switches
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low-ESR Ceramic Output Capacitors
Manufacturer | Richtek USA Inc. |
---|---|
Category | AC/DC and DC/DC Conversion |
Sub-Category | DC/DC SMPS - Single Output |
Eval Board Part Number | EVB_RT7237AHGSP-ND |
Eval Board Supplier | Richtek USA Inc. |
Eval Board |
Normally In Stock
|
Topology |
Step Down
|
Outputs and Type |
1 Non-Isolated
|
Voltage Out: Factory Set |
3.3 V
|
Current Out |
2 A
|
Voltage In |
4.5 ~ 18 V
|
Efficiency @ Conditions |
>90%, 4.5V in, 3.3V @ 0.02 ~ 1.5 A
>90%, 17V in, 3.3V @ 0.3 ~ 1.5 A >90%, 12V in, 3.3V @ 0.2 ~ 1.5 A |
Voltage Out Range |
0.8 ~ 15 V
|
Features |
Current Limit (Adj. or Fixed)
Soft Start Thermal Protection Under Voltage Protection, Brown-Out |
Switching Frequency |
340 kHz
|
Standby Current [Typical] |
500 nA
|
Quiescent Current [Typical] |
800 µA
|
Component Count + Extras |
15 + 15
|
Internal Switch |
Yes
|
Design Author |
Richtek USA Inc.
|
Application / Target Market |
FPGA / DSP / Processors
LCD Backlighting LCD TV / Monitor Point of Load (PoL) Power: Industrial Power RF: WLAN Access Points Set-Top Boxes White Goods |
Standby Current [Maximum] |
3 µA
|
Quiescent Current [Maximum] |
1.2 mA
|
Main I.C. Base Part |
RT7237A
|
Date Created By Author | 2014-07 |
Date Added To Library | 2022-06 |