ADP2384(Rev0) データシートの表示（PDF） - Analog Devices
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ADP2384 Datasheet PDF : 24 Pages
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Data Sheet
20 V, 4 A, Synchronous, Step-Down
DC-to-DC Regulator
ADP2384
FEATURES
Input voltage: 4.5 V to 20 V
Integrated MOSFET: 44 mΩ/11.6 mΩ
Reference voltage: 0.6 V ± 1%
Continuous output current: 4 A
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
External compensation
Internal soft start with external adjustable option
Startup into a precharged output
Supported by ADIsimPower design tool
APPLICATIONS
Communications infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversion
DC-to-dc point-of-load applications
GENERAL DESCRIPTION
The ADP2384 is a synchronous, step-down dc-to-dc regulator
with an integrated 44 mΩ, high-side power MOSFET and
an 11.6 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 ADP2384
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.
The ADP2384 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 and delivers up to
TYPICAL APPLICATIONS CIRCUIT
VIN
CIN
RT
CVREG
ADP2384
PVIN
BST
EN
SW
PGOOD
SYNC
RT
FB
COMP
VREG
SS
GND PGND
CBST L
RTOP
RC
CSS
RBOT
CC
VOUT
COUT
Figure 1.
100
95
90
85
80
75
70
65
60
VOUT = 1.2V
55
VOUT = 3.3V
VOUT = 5V
50
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz
4 A of continuous current. Each IC draws less than 120 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 ADP2384 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. 0
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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