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| MIC28512 Datasheet, PDF (1/34 Pages) Microchip Technology – 70V, 2A Synchronous Buck Regulator | |||
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MIC28512
70V, 2A Synchronous Buck Regulator
Features
⢠4.6V to 70V Operating Input Voltage Supply
⢠Up to 2A Output Current
⢠Integrated High-Side and Low-Side N-Channel
MOSFETs
⢠HyperLight Load (MIC28512-1) and Hyper Speed
Control (MIC28512-2) 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
FCQFN 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 MIC28512 is a synchronous step-down switching
regulator with internal power switches capable of
providing up to 2A output current from a wide input
supply range from 4.6V to 70V. 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 Hyper
Speed Control® and HyperLight Load® architectures of
the MIC28512 allow for high VIN (low VOUT) operation
and ultra-fast transient response while reducing the
required output capacitance and providing very good
light-load efficiency.
The MIC28512 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
MIC28512
24-Pin 3 mm x 4 mm FCQFN (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.
DS20005524A-page 1
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