ADP2165/ADP2166: 5.5 V, 5A/6A, High Efficiency, Step-Down DC-to-DC Regulators with Output Tracking Data Sheet0 pages

TYPICAL APPLICATION CIRCUIT

Continuous output current
ADP2165: 5 A
ADP2166: 6 A
Integrated MOSFET
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
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
Programmable soft start
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_WQ package
Supported by ADIsimPower™ design tool

APPLICATIONS
Point of load regulation
Communications and networking
High end consumer
Industrial, instrumentation, and healthcare

BST
CBST

AVIN

CIN

VOUT

PGOOD

RTOP

SYNC

RRT

COUT

FB

RT
CVREG

L1

SW

EN

COMP

TRK
SS

VREG
GND

PGND

CCP
CSS

RC

RBOT

CC

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.
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.
The ADP2165/ADP2166 operate over the −40°C to +125°C
junction temperature range and are available in a 24-lead
LFCSP_WQ package.

GENERAL DESCRIPTION

100

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
electromagnetic interference (EMI) of the system.

VPVIN = 3.3V
95
90
VPVIN = 5V
85
EFFICIENCY (%)

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.

Rev. 0

ADP2165/
ADP2166

PVIN

VPVIN

10956-001

FEATURES

80
75
70
65
60
55

VOUT = 1.8V
fSW = 600kHz

50
0

1

2

3

4

OUTPUT CURRENT (A)

5

6

10956-002

Data Sheet

5.5 V, 5 A/6 A, High Efficiency, Step-Down
DC-to-DC Regulators with Output Tracking
ADP2165/ADP2166

Figure 2. Efficiency vs. Output Current

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