ADI ADP2116多功能同步DC电源转换方案

ADI 公司的ADP2116是多功能同步降压DC/DC开关稳压电源,两个PWM通路可提供独立的3A和3A或3A和2A输出或配置成单路6A输出.输入电压2.75V-5.5V,可选择固定输出电压0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V或 3.3 V,或可调节输出电压低至0.6V,效率高达95%.主要应用在点负载,通信和网络系统消费类电子,工业和仪表与医疗设备.本文介绍ADP2116主要特性,方框图,几种典型应用电路和ADP2116评估板的主要特性,电路图和所用材料清单.

The ADP2116 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 3 A and 3 A (or at 3 A and 2 A) or can be configured as a single interleaved output capable of delivering 6 A. The two PWM channels are 180° phase shifted to reduce input ripple current and input capacitance.

The ADP2116 provides high efficiency and can operate at switching frequencies of up to 2 MHz. At light loads, the ADP2116 can be set to operate in pulse skip mode for higher efficiency or in forced PWM mode for noise sensitive applications.

The ADP2116 is designed with an optimized slew rate to reduce EMI emissions, allowing the device to power sensitive, high perfor-mance signal chain circuits. The switching frequency can be set to 300 kHz, 600 kHz, or 1.2 MHz, or it 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 ADP2116 input voltage range is from 2.75 V to 5.5 V and can convert to a fixed output 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. If a resistor divider is used, the output voltage can be set as low as 0.6 V. The ADP2116 operates over the −40°C to +125°C junction temperature range.

ADP2116主要特性:

Configurable 3 A/3 A or 3 A/2 A dual-output load combinations or 6 A combined single-output load

High efficiency: up to 95%

Input voltage, VIN: 2.75 V to 5.5 V

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

±1.5% accurate reference voltage

Selectable switching frequency of 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 mode with light loads or forced PWM operation

Input undervoltage lockout (UVLO)

Independent enable inputs and power-good outputs

Overcurrent and thermal overload protection

Programmable soft start

32-lead, 5 mm × 5 mm LFCSP package

ADP2116应用:

Point-of-load regulation

Telecommunications and networking systems

Consumer electronics

Industrial and instrumentation

Medical

图1.ADP2116简化方框图

图2.ADP2116输出3A/3A应用电路图

图3.ADP2116输出6A应用电路图

图4.ADP2116输出3A/2A应用电路图

图5.ADP2116可调输出应用电路图

ADP2116评估板
 
The ADP2116 evaluation (demo) board is a complete, dual, step-down, dc-to-dc converter design based on the ADP2116, a configurable, dual 3 A/single 6 A, synchronous step-down, dc-to-dc regulator.

The ADP2116 is a versatile step-down switching regulator that satisfies a wide range of user point-of-load requirements. The two PWM channels are 180° phase shifted and provide ±1.5% accurate regulated output voltages. For more details, see the ADP2116 data sheet.

The ADP2116 evaluation board comes configured with 2.5 V at 3 A and 1.2 V at 3 A outputs, the switching frequency is set to 600 kHz, and pulse skip is enabled. If needed, the ADP2116 evaluation board output voltages and configuration can be modified by changing the values of the appropriate passive components and changing the links. The ambient temperature operating range is from −40℃ to +85℃.

ADP2116评估板主要特性:

Full featured demo board for the ADP2116

Standalone capability

Configurable, dual synchronous step-down, dc-to-dc switching regulator

Dual 3 A/3 A or 3 A/2 A output or single combined 6 A output

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

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

Configurable SYNC input or CLKOUT output

Two independent enable inputs

Two power good outputs

Externally programmable soft start

Size: 3-9/16 inch × 2-5/8 inch

ADP2116评估板应用:

Demonstrate features and configurability of ADP2116

Emulate functionality of ADP2116 in a user’s circuit

Evaluate ADP2116 performance


图6.ADP2116评估板外形图
 
ADP2116-EVALZ—VOUT1: 2.5 V @ 3 A; VOUT2: 1.2 V @ 3 A; fSW = 600 kHz; Pulse Skip Enabled


图7.ADP2116评估板电路图(双输出:2.5V/3A,1.2V/3A,开关频率600kHz,脉冲调频使能)

ADP2116-EVALZ 材料清单(BOM):