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  Microchip Technology Semiconductor Electronic Components Datasheet  

MIC2876 Datasheet

Synchronous Boost Regulator

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MIC2876
4.8A ISW, Synchronous Boost Regulator
with Bi-Directional Load Disconnect
Features
• Up to 95% Efficiency
• Input Voltage Range from 2.5V to 5.5V
• Fully Integrated, High-Efficiency, 2 MHz
Synchronous Boost Regulator
• Bi-Directional True Load Disconnect
• Integrated Anti-Ringing Switch
• <1 µA Shutdown Current
• Bypass Mode for VIN VOUT
• Overcurrent Protection and Thermal Shutdown
• Fixed and Adjustable Output Versions
• 8-pin 2 mm × 2 mm UDFN package
Applications
• Tablets and Smartphones
• USB OTG and HDMI Hosts
• Portable Power Reserve Supplies
• High-Current Parallel Lithium Cell Applications
• Portable Equipment
General Description
The MIC2876 is a compact and highly efficient 2 MHz
synchronous boost regulator with a 4.8A switch. It
features a bi-directional load disconnect function that
prevents any leakage current between the input and
output when the device is disabled. The MIC2876
operates in bypass mode automatically when the input
voltage is greater than the target output voltage. At light
loads, the boost converter goes to the PFM mode to
improve the efficiency.
The MIC2876 also features an integrated anti-ringing
switch to minimize EMI.
The MIC2876 is available in a 8-pin 2 mm × 2 mm
UDFN package, with a junction temperature range of
–40°C to +125°C.
Package Types
MIC2876 (FIXED OUTPUT)
8-Pin 2x2 UDFN* (MT)
(Top View)
MIC2876 (ADJ. OUTPUT)
8-Pin 2x2 UDFN* (MT)
(Top View)
SW 1 Ÿ
PGND 2
IN 3
AGND 4
EP
8 OUT
7 /PG
6 EN
5 OUTS
SW 1 Ÿ
PGND 2
IN 3
EP
AGND 4
* Includes Exposed Thermal Pad (EP), see Table 3-1.
8 OUT
7 /PG
6 EN
5 FB
2016 Microchip Technology Inc.
DS20005572A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MIC2876 Datasheet

Synchronous Boost Regulator

No Preview Available !

MIC2876
Typical Application Schematics
MIC2876 (Fixed Output)
2x2 UDFN
L1
1μH
2.5V to 5.0V
VIN
C1
4.7μF
10V
SW
IN OUT
R1
0ȍ
EN
/PG
VIN
OUTS
PGND AGND
VOUT
5.0V
C2*
22μF
10V
2.5V to 5.0V
VIN
C1
4.7μF
10V
MIC2876 (Adj. Output)
2x2 UDFN
L1
1μH
SW
IN OUT
R1
0ȍ
EN
/PG
VIN
FB
PGND AGND
R2
Nȍ
R3
Nȍ
VOUT
5.0V
C2*
22μF
10V
* Two more 22 µF capacitors should be added in parallel with C2 for VIN > 5.0V.
Efficiency vs. Load Current
Functional Block Diagrams
MIC2876 (Fixed Output)
EN IN
SW
ANTI-
RINGING
REFERENCE
GENERATOR
VIN
BODY
DRIVER
2MHz
OSCILLATOR
PWM
LOGIC
CONTROL
LS
DRIVER
OC
PWM
4.8A
CURRENT
SENSE
+
SLOPE
COMPENSATION
HS
DRIVER
VIN
OUT
OUTS
/PG
VREF
SOFT-
START
PGND
AGND
MIC2876 (Adj. Output)
EN IN
SW
ANTI-
RINGING
REFERENCE
GENERATOR
VIN
BODY
DRIVER
2MHz
OSCILLATOR
PWM
LOGIC
CONTROL
LS
DRIVER
OC
PWM
4.8A
CURRENT
SENSE
+
SLOPE
COMPENSATION
HS
DRIVER
PGL
PGH
VREF
SOFT-
START
OUT
/PG
FB
PGND
AGND
DS20005572A-page 2
2016 Microchip Technology Inc.


Part Number MIC2876
Description Synchronous Boost Regulator
Maker Microchip
PDF Download

MIC2876 Datasheet PDF






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