Datasheet ADP2165, ADP2166 (Analog Devices)

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/ ADP2165: 5 A PVIN ADP2166 BST V ADP2166: 6 A PVIN CBST AVIN L1 CIN Integrated MOSFET SW V EN OUT C High-side on resistance: 19 mΩ PGOOD OUT RTOP Low-side on resistance: 15 mΩ SYNC RRT FB Reference voltage: 0.6 V ± 1% over temperature range RT COMP TRK Input voltage range: 2.7 V to 5.5 V CVREG C R CP C R VREG SS BOT Current mode architecture C GND PGND C CSS Switching frequency
001
Fixed frequency: 620 kHz or 1.2 MHz
10956-
Adjustable frequency: 250 kHz to 1.4 MHz
Figure 1.
Synchronizes to external clock: 250 kHz to 1.4 MHz
The ADP2165/ADP2166 are designed to be extremely flexible
Selectable synchronize phase shift: in phase or out of phase
with the addition of a minimal amount of external components
External compensation
to program soft start and control loop compensation.
Programmable soft start Startup into a precharged output
The ADP2165/ADP2166 are supplied from an input voltage of
Voltage tracking input
2.7 V to 5.5 V. Output voltage options include 3.3 V, 2.5 V, 1.8 V,
Power-good output and precision enable input
1.5 V, 1.2 V, or 1.0 V fixed outputs and adjustable options capable
Accurate current limit
of supporting an output voltage range from 0.6 V to 90% of the
Available in 24-lead, 4 mm × 4 mm LFCSP package
input voltage. Protection features include undervoltage lockout
Supported by ADIsimPower™ design tool
(UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD) for robust performance.
APPLICATIONS
The ADP2165/ADP2166 operate over the −40°C to +125°C
Point of load regulation
junction temperature range and are available in a 24-lead
Communications and networking
LFCSP package.
High end consumer Industrial, instrumentation, and healthcare 100 GENERAL DESCRIPTION VPVIN = 3.3V 95
The ADP2165/ADP2166 are high efficiency, current mode
90
control, step-down dc-to-dc regulators with an integrated 19 mΩ
VPVIN = 5V 85
high-side FET and a 15 mΩ synchronous rectified FET. The
%)
ADP2165/ADP2166 combine a smal size, 4 mm × 4 mm LFCSP
( 80
package with an accurate current limit, resulting in a smaller
NCY 75 E
inductor size and a high power density, point of load solution.
ICI F 70 F E
Key features include precision enable, power-good monitor,
65
and output voltage tracking to facilitate robust sequencing.
60
The switching frequency can be programmed from 250 kHz
55 VOUT = 1.8V
to 1.4 MHz, or it can be fixed at 620 kHz or 1.2 MHz. The
fSW = 600kHz 50
synchronization function al ows the switching frequency to
0 1 2 3 4 5 6
002 synchronize to an external clock, minimizing the
OUTPUT CURRENT (A)
10956- electromagnetic interference (EMI) of the system. Figure 2. Efficiency vs. Output Current
Rev. B Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2014–2017 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline Features Applications General Description Typical Application Circuit Revision History Functional Block Diagram Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Control Scheme PWM Mode Enable/Shutdown Internal Regulator (VREG) Bootstrap Circuitry Oscillator and Synchronization Soft Start Tracking Power-Good (PGOOD) Peak Current-Limit and Short-Circuit Protection Overvoltage Protection Undervoltage Lockout Thermal Shutdown Applications Information ADIsimPower Design Tool Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Inductor Selection Output Capacitor Selection Compensation Design Design Example Output Voltage Setting Frequency Setting Inductor Selection Output Capacitor Selection Compensation Components Soft Start Time Program Input Capacitor Selection Recommended External Components Printed Circuit Board Layout Recommendations Reference Designs Outline Dimensions Ordering Guide