ADP1882 Analog Devices, ADP1882 Datasheet - Page 2

• Manufacturer Part Number: ADP1882
• Description: Synchronous Current-Mode Buck Controller with Constant On-time and 0.8 V Reference Voltage
• Manufacturer: Analog Devices

ADP1882/ADP1883
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Typical Applications Circuit ............................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
ADP1882/ADP1883 Block Diagram ............................................ 18
Theory of Operation ...................................................................... 19
REVISION HISTORY
4/10—Revision 0: Initial Version
Thermal Resistance ...................................................................... 5
Boundary Condition .................................................................... 5
ESD Caution .................................................................................. 5
Startup .......................................................................................... 19
Soft Start ...................................................................................... 19
Precision Enable Circuitry ........................................................ 19
Undervoltage Lockout ............................................................... 19
Thermal Shutdown ..................................................................... 19
Programming Resistor (RES) Detect Circuit .......................... 20
Valley Current-Limit Setting .................................................... 20
Hiccup Mode During Short Circuit ......................................... 21
Synchronous Rectifier ................................................................ 22
Power Saving Mode (PSM) Version (ADP1883) .................... 22
Rev. 0 | Page 2 of 40
Applications Information .............................................................. 24
External Component Recommendations .................................... 31
Layout Considerations ................................................................... 33
Typical Applications Circuits ........................................................ 37
Outline Dimensions ....................................................................... 39
Timer Operation ........................................................................ 22
Pseudo-Fixed Frequency ........................................................... 23
Feedback Resistor Divider ........................................................ 24
Inductor Selection ...................................................................... 24
Output Ripple Voltage (ΔV
Output Capacitor Selection ....................................................... 24
Compensation Network ............................................................ 25
Efficiency Considerations ......................................................... 26
Input Capacitor Selection .......................................................... 27
Thermal Considerations ............................................................ 28
Design Example .......................................................................... 28
IC Section (Left Side of Evaluation Board) ............................. 36
Power Section ............................................................................. 36
Differential Sensing .................................................................... 36
Dual-Input, 300 kHz High Current Applications Circuit ..... 37
Single-Input, 600 kHz Applications Circuit ........................... 37
Dual-Input, 300 kHz High Current Applications Circuit ..... 38
Ordering Guide .......................................................................... 39
RR
) .................................................. 24