LM21212-2
- Integrated 7-mΩ High Side and 4.3-mΩ Low-Side FET Switches
- 300-kHz to 1.55-MHz Resistor-Adjustable Frequency
- Adjustable Output Voltage from 0.6 V to VIN (100% Duty Cycle Capable), ±1% Reference
- Input Voltage Range 2.95 V to 5.5 V
- Startup Into Prebiased Loads
- Output Voltage Tracking Capability
- Wide Bandwidth Voltage Loop Error Amplifier
- Adjustable Soft-Start With External Capacitor
- Precision Enable Pin With Hysteresis
- Integrated OVP, OCP, OTP, UVLO, and Power-Good
- Thermally Enhanced 20-Pin HTSSOP Exposed Pad Package
- Create a custom design using the LM21212-2 with the WEBENCH® Power Designer
The LM21212-2 is a monolithic synchronous buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suitable for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity and narrow duty-cycle capability, and it can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.
The LM21212-2 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.
The LM21212-2 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be programmed between 300 kHz and 1.55 MHz with an external resistor.
If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | LM21212-2 2.95-V to 5.5-V, 12-A, Voltage-Mode Synchronous Buck Regulator With Adjustable Frequency datasheet (Rev. B) | PDF | HTML | 2019/06/03 |
| White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 2024/04/30 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 2021/04/08 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018/06/25 | ||
| User guide | AN-2140 LM21212-2 Evaluation Board (Rev. A) | 2013/05/05 |
설계 및 개발
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LM21212-2EVM — LM21212-2용 평가 보드
This evaluation board provides a solution to examine the high efficiency LM21212-2 buck switching regulator. The LM21212-2 is capable of driving up to 12A of continuous load current with excellent output voltage accuracy due to its ±1% internal reference. The LM21212-2 is capable of down converting (...)
LM21212-2 Unencrypted PSpice Average Model Package (Rev. A)
LM21212-2 Unencrypted PSpice Transient Model Package (Rev. A)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치