The ADP2114 is a versatile, synchronous step-down, switching regulator that satisfies a wide range of customer point-of-load requirements. The two PWM channels can be configured to deliver independent outputs at 2 A and 2 A (or 3 A/1 A) or can be configured as a single interleaved output capable of delivering 4 A. The two PWM channels are 180º phase shifted to reduce input ripple current and to reduce input capacitance.

The ADP2114 provides high efficiency and operates at switching frequencies of up to 2 MHz. At light loads, the ADP2114 can be set to operate in pulse skip mode for higher efficiency or in forced PWM mode to reduce EMI.

The ADP2114 is designed with an optimized gate slew rate to reduce EMI emissions, allowing it to power sensitive, high performance signal chain circuits. The switching frequency can be set to 300 kHz, 600 kHz, or 1.2 MHz and can be synchronized to an external clock that minimizes the system noise. The bidirectional synchronization pin is also configurable as a 90° out-of-phase output clock, providing the possibility for a stackable multiphase power solution.

The ADP2114 input voltage range is from 2.75 V to 5.5 V, and it converts to fixed outputs of 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, or 3.3 V that can be set independently for each channel using external resistors. Using a resistor divider, it is also possible to set the output voltage as low as 0.6 V. The ADP2114 operates over the −40℃ to +125℃ junction temperature range.

ADP2114主要特性:

Configurable 2 A/2 A or 3 A/1 A dual output load combinations or 4 A combined single output

High efficiency: up to 95%

Input voltage VIN: 2.75 V to 5.5 V

Selectable fixed output: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V or adjustable output voltage to 0.6 V minimum

±1.5% accurate reference voltage

Selectable switching frequency: 300 kHz, 600 kHz, 1.2 MHz or synchronized from 200 kHz to 2 MHz

Optimized gate slew rate for reduced EMI

External synchronization input or internal clock output

Dual-phase, 180° phase shifted PWM channels

Current mode for fast transient response

Pulse skip under light load or forced PWM operation

Input undervoltage lockout (UVLO)

Independent enable inputs and PGOOD outputs

Overcurrent and thermal overload protection

Externally programmable soft start

32-lead 5 mm × 5 mm LFCSP package

ADP2114应用:

Point of load regulation

Telecommunications and networking systems

Consumer electronics

Industrial and Instrumentation

Medical

图1.ADP2114简化的方框图

图2.ADP2114典型应用电路

图3.ADP2114双路2A输出应用电路

图4.ADP2114单路4A输出应用电路

图5.ADP2114 3A/1A输出应用电路

图6. ADP2114可调输出应用电路