5.5 V, 5 A/6 A, High Efficiency, Step-Down
DC-to-DC Regulators with Output Tracking
Data Sheet
ADP2165/ADP2166
FEATURES
TYPICAL APPLICATION CIRCUIT
Continuous output current
ADP2165: 5 A
ADP2166: 6 A
Integrated MOSFET
ADP2165/
ADP2166
PVIN
AVIN
EN
BST
SW
V
PVIN
C
BST
L1
R
C
IN
V
OUT
C
OUT
PGOOD
SYNC
RT
High-side on resistance: 19 mΩ
Low-side on resistance: 15 mΩ
Reference voltage: 0.6 V 1% over temperature range
Input voltage range: 2.7 V to 5.5 V
Current mode architecture
TOP
R
RT
FB
COMP
TRK
C
VREG
C
R
CP
C
R
BOT
VREG
SS
C
C
GND PGND
C
SS
Switching frequency
Fixed frequency: 620 kHz or 1.2 MHz
Adjustable frequency: 250 kHz to 1.4 MHz
Synchronizes to external clock: 250 kHz to 1.4 MHz
Selectable synchronize phase shift: in phase or out of phase
External compensation
Figure 1.
The ADP2165/ADP2166 are designed to be extremely flexible
with the addition of a minimal amount of external components
to program soft start and control loop compensation.
Programmable soft start
The ADP2165/ADP2166 are supplied from an input voltage of
2.7 V to 5.5 V. Output voltage options include 3.3 V, 2.5 V, 1.8 V,
1.5 V, 1.2 V, or 1.0 V fixed outputs and adjustable options capable
of supporting an output voltage range from 0.6 V to 90% of the
input voltage. Protection features include undervoltage lockout
(UVLO), overvoltage protection (OVP), overcurrent protection
(OCP), and thermal shutdown (TSD) for robust performance.
Startup into a precharged output
Voltage tracking input
Power-good output and precision enable input
Accurate current limit
Available in 24-lead, 4 mm × 4 mm LFCSP package
Supported by ADIsimPower™ design tool
APPLICATIONS
The ADP2165/ADP2166 operate over the −40°C to +125°C
junction temperature range and are available in a 24-lead
LFCSP package.
Point of load regulation
Communications and networking
High end consumer
Industrial, instrumentation, and healthcare
100
V
= 3.3V
PVIN
GENERAL DESCRIPTION
95
90
85
80
75
70
65
60
55
50
The ADP2165/ADP2166 are high efficiency, current mode
control, step-down dc-to-dc regulators with an integrated 19 mΩ
high-side FET and a 15 mΩ synchronous rectified FET. The
ADP2165/ADP2166 combine a small size, 4 mm × 4 mm LFCSP
package with an accurate current limit, resulting in a smaller
inductor size and a high power density, point of load solution.
V
= 5V
PVIN
Key features include precision enable, power-good monitor,
and output voltage tracking to facilitate robust sequencing.
The switching frequency can be programmed from 250 kHz
to 1.4 MHz, or it can be fixed at 620 kHz or 1.2 MHz. The
synchronization function allows the switching frequency to
synchronize to an external clock, minimizing the
V
= 1.8V
OUT
fSW = 600kHz
0
1
2
3
4
5 6
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current
electromagnetic interference (EMI) of the system.
Rev. B
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Tel: 781.329.4700 ©2014–2017 Analog Devices, Inc. All rights reserved.
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