ADP2311 Dual 1 A, 18 V Synchronous Step-Down Regulator with Fail-safe Voltage Monitoring

The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current.

The ADP2311 integrates the high-side and low-side MOSFETs to provide a very high efficiency, compact solution. Both channels of the regulator run at 180° out of phase to reduce the input ripple current and the input capacitor size, thereby helping to lower system electromagnetic interference (EMI). The ADP2311 also integrates internal compensation and soft start circuitry to simplify the design.

An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. Accurate voltage monitoring circuitry and a power fail comparator provide a controlled power-up and power-down sequence to enhance system reliability.

The ADP2311 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2311 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead LFCSP package.

Applications

Industrial and instrumentation
Healthcare and medical
DC-to-dc point of load applications

产品特点和性能优势

Input voltage: 4.5 V to 18 V
±1.0% output accuracy
Integrated MOSFET: 110 mΩ/ 60 mΩ typical
Continuous output current: 1 A/ 1 A
Power fail comparator generates warning
Power-on reset with programmable delay timer

Adjustable voltage monitor for power down (channel 2)
Watchdog refresh input
Dual phase with 180° out of phase operation
Fixed switching frequency: 300 kHz
Internal compensation and soft start
See data sheet for additional features

电源管理

开关稳压器

数据手册

文档	备注
ADP2311: 双通道、1 A、18 V同步降压稳压器，集成故障安全电压监控功能 (Rev. A)	PDF 813 kB
ADP2311: Dual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring Data Sheet (Rev. A)	PDF 615 kB

用户手册

文档	备注
UG-653：提供故障保护电压监控的双通道、1 A、18 V同步降压稳压器ADP2311的评估板	PDF 329 kB
UG-653: Evaluation Board for the ADP2311, Dual, 1 A, 18 V Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring	PDF 329 kB

订购信息

产品型号	封装	包装数量	温度范围	美金报价 1000+	RoHS
ADP2311ACPZ-1-R7 量产	24 ld LFCSP 4x4mm (2.5EP)	REEL 1500	-40 至 125至	2.38	Y
ADP2311ACPZ-2-R7 量产	24 ld LFCSP 4x4mm (2.5EP)	REEL 1500	-40 至 125至	2.38	Y
ADP2311ACPZ-3-R7 量产	24 ld LFCSP 4x4mm (2.5EP)	REEL 1500	-40 至 125至	2.38	Y
ADP2311ACPZ-4-R7 量产	24 ld LFCSP 4x4mm (2.5EP)	REEL 1500	-40 至 125至	2.38	Y

评估板

产品型号	描述	美金报价	RoHS
ADP2311-1-EVALZ	Evaluation Board	50	Y

ADP2311: 双通道、1 A、18 V同步降压稳压器，集成故障安全电压监控功能 (Rev. A) adp2311

ADP2311: Dual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring Data Sheet (Rev. A) adp2311

UG-653: Evaluation Board for the ADP2311, Dual, 1 A, 18 V Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring adp2311