Configurable, Dual 2 A/Single 4 A,
Synchronous Step-Down DC-to-DC Regulator
ADP2114
FEATURES
TYPICAL APPLICATION CIRCUIT
V
= 5V
IN
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%
10Ω
1µF
100kΩ
100kΩ
EN2
EN1
VIN1
VIN2
Input voltage VIN: 2.75 V to 5.5 V
VIN4
22µF
22µF
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)
VIN5
VIN6
VIN3
PGOOD1
SW1
PGOOD2
PGOOD1
PGOOD2
4.7µH
V
= 3.3V, 2A
OUT1
V
= 1.8V, 2A
2.2µH
OUT2
SW3
ADP2114
SW2
PGND1
PGND2
SW4
47µF
PGND3
22µF 47µF
SYNC
PGND4
FB1
FB2
V2SET
47kΩ
V1SET
15kΩ
SYNC/CLKOUT
COMP2
COMP1
SS1
22kΩ
1.2nF
SS2
22kΩ
1.2nF
10nF
10nF
Independent enable inputs and PGOOD outputs
Overcurrent and thermal overload protection
Externally programmable soft start
8.2kΩ
fSW = 600kHz
Figure 1.
32-lead 5 mm × 5 mm LFCSP package
APPLICATIONS
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°C to +125°C junction temperature range.
Point of load regulation
Telecommunications and networking systems
Consumer electronics
Industrial and Instrumentation
Medical
GENERAL DESCRIPTION
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.
100
V
= 3.3V; V = 1.8V
OUT
IN
V
= 5.0V; V = 3.3V
OUT
IN
95
90
85
80
75
70
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.
V
= 5.0V; V = 1.8V
OUT
IN
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.
0.01
0.1
1
3
LOAD CURRENT (A)
Figure 2. Typical Efficiency vs. Load Current
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2009 Analog Devices, Inc. All rights reserved.
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