20 V, 6 A, Synchronous Step-Down
DC-to-DC Regulator
Data Sheet
ADP2386
FEATURES
TYPICAL APPLICATIONS CIRCUIT
Input voltage: 4.5 V to 20 V
Integrated MOSFET: 44 mΩ/11 mΩ
Reference voltage: 0.6 V 1%
ADP2386
BST
V
PVIN
EN
IN
C
BST
L
C
IN
SW
V
OUT
Continuous output current: 6 A
C
OUT
PGOOD
SYNC
RT
R
TOP
Programmable switching frequency: 200 kHz to 1.4 MHz
Synchronizes to external clock: 200 kHz to 1.4 MHz
180° out of phase clock synchronization
Precision enable and power good
FB
COMP
SS
R
T
R
C
R
VREG
BOT
C
C
VREG
GND PGND
C
C
External compensation
SS
Internal soft start with external adjustable option
Startup into a precharged output
Supported by ADIsimPower design tool
Figure 1.
APPLICATIONS
100
95
90
85
80
75
70
65
60
55
50
Communications infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversion
DC-to-dc point-of-load applications
V
V
V
= 5.0V
= 3.3V
= 1.2V
OUT
OUT
OUT
0
1
2
3
4
5
6
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz
GENERAL DESCRIPTION
The ADP2386 is a synchronous step-down, dc-to-dc regulator with
an integrated 44 mΩ, high-side power MOSFET and an 11 mΩ,
synchronous rectifier MOSFET to provide a high efficiency
solution in a compact 4 mm × 4 mm LFCSP package. This device
uses a peak current mode, constant frequency pulse-width
modulation (PWM) control scheme for excellent stability and
transient response. The switching frequency of the ADP2386
can be programmed from 200 kHz to 1.4 MHz. To minimize
system noise, the synchronization function allows the switching
frequency to be synchronized to an external clock.
and delivers up to 6 A of continuous current. Each IC draws less
than 110 μA current from the input source when it is disabled.
This regulator targets high performance applications that require
high efficiency and design flexibility. External compensation and an
adjustable soft start function provide design flexibility. The power-
good output and precision enable input provide simple and reliable
power sequencing.
Other key features include undervoltage lockout (UVLO),
overvoltage protection (OVP), overcurrent protection (OCP),
short-circuit protection (SCP), and thermal shutdown (TSD).
The ADP2386 requires minimal external components and
operates from an input voltage of 4.5 V to 20 V. The output
voltage can be adjusted from 0.6 V to 90% of the input voltage
The ADP2386 operates over the −40°C to +125°C junction
temperature range and is available in a 24-lead, 4 mm × 4 mm
LFCSP package.
Rev. A
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