Configurable, Dual 3 A/Single 6 A,

Synchronous, Step-Down DC-to-DC Regulator

ADP2116

Rev. 0

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FEATURES

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%

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

APPLICATIONS

Point-of-load regulation

Telecommunications and networking systems

Consumer electronics

Industrial and instrumentation

Medical

GENERAL DESCRIPTION

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

TYPICAL APPLICATION CIRCUIT

30k

Ω

820pF

30k

Ω

820pF

47µF

22µF

3.3µH

100µF

22µF

22µF

1µF

47µF

2.2µH

10

Ω

100k

Ω

100k

Ω

27k

Ω

V1SET

4.7k

Ω

VIN1

VIN2

VIN3

SW1

SW2

FB1

COMP1

SS1

EN1

COMP2

PGND4

PGND3

FB2

V2SET

SYNC/CLKOUT

SW4

SW3

VIN6

VIN5

VIN4

EN2

PGOOD2

ADP2116

PGOOD2

SYNC

PGOOD1

8.2k

Ω

SS2

10nF

10nF

PGND1

PGND2

PGOOD1

Figure 1.

100

60

70

75

65

80

85

90

95

10

100

1k

10k

LOAD CURRENT (mA)

Figure 2. Typical Efficiency vs. Load Current

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.