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MIC28513 Datasheet, PDF (1/34 Pages) Microchip Technology – 45V, 4A Synchronous Buck Regulator | |||
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MIC28513
45V, 4A Synchronous Buck Regulator
Features
⢠4.6V to 45V Operating Input Voltage Supply
⢠Up to 4A Output Current
⢠Integrated High-Side and Low-Side N-Channel
MOSFETs
⢠HyperLight Load (MIC28513-1) and Hyper Speed
Control (MIC28513-2) Architecture
⢠Enable Input and Power Good (PGOOD) Output
⢠Programmable Current-Limit and Foldback
âHiccupâ Mode Short-Circuit Protection
⢠Built-In 5V Regulator for Single-Supply Operation
⢠Adjustable 200 kHz to 680 kHz Switching
Frequency
⢠Fixed 5 ms Soft-Start
⢠Internal Compensation and Thermal Shutdown
⢠Thermally-Enhanced 24-Pin 3 mm x 4 mm FQFN
Package
⢠â40°C to +125°C Junction Temperature Range
Applications
⢠Industrial Power Supplies
⢠Distributed Supply Regulation
⢠Base Station Power Supplies
⢠Wall Transformer Regulation
⢠High-Voltage Single-Board Systems
General Description
The MIC28513 is a synchronous step-down switching
regulator with internal power switches capable of
providing up to 4A output current from a wide input
supply range from 4.6V to 45V. The output voltage is
adjustable down to 0.8V with a guaranteed accuracy of
±1%. A constant switching frequency can be
programmed from 200 kHz to 680 kHz. The
MIC28513âs Hyper Speed Control® and HyperLight
Load® architectures allow for high VIN (low VOUT)
operation and ultra-fast transient response while
reducing the required output capacitance. The
MIC28513-1âs HyperLight Load architecture also
provides very good light load efficiency.
The MIC28513 offers a full suite of features to ensure
protection under fault conditions. These include
undervoltage lockout to ensure proper operation under
power sag conditions, internal soft-start to reduce
inrush current, foldback current limit, âhiccupâ mode
short-circuit protection, and thermal shutdown.
Package Type
MIC28513
24-Pin 3 mm x 4 mm FQFN (FL)
DL 1
PGND 2
DH 3
PVIN 4
LX 5
BST 6
PVIN 7
PVIN 8
24 23 22 21
9 10 11 12
20 PVDD
19 VDD
18 ILIM
17 VIN
16 EN
15 PGOOD
14 FB
13 AGND
ï£ 2016 Microchip Technology Inc.
DS20005522A-page 1
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