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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1663 Datasheet

High-Voltage Integrated Switch PWM Boost Regulator

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MCP1663
High-Voltage Integrated Switch PWM Boost Regulator with UVLO
Features
• 36V, 400 mIntegrated Switch
• Up to 92% Efficiency
• Output Voltage Range: up to 32V
• 1.8A Peak Input Current Limit:
- IOUT > 375 mA @ 5.0V VIN, 12V VOUT
- IOUT > 200 mA @ 3.3V VIN, 12V VOUT
- IOUT > 150 mA @ 4.2V VIN, 24V VOUT
• Input Voltage Range: 2.4V to 5.5V
• Undervoltage Lockout (UVLO):
- UVLO @ VIN Rising: 2.3V, typical
- UVLO @ VIN Falling: 1.85V, typical
• No Load Input Current: 250 µA, typical
• Sleep mode with 0.3 µA Typical Shutdown
Quiescent Current
• PWM Operation with Skip Mode: 500 kHz
• Feedback Voltage Reference: VFB = 1.227V
• Cycle-by-Cycle Current Limiting
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
• Output Overvoltage Protection (OVP) in the event
of:
- Feedback pin shorted to GND
- Disconnected feedback divider
• Overtemperature Protection
• Easily Configurable for SEPIC, Cuk or Flyback
Topologies
• Available Packages:
- 5-Lead SOT-23
- 8-Lead 2x3 TDFN
Applications
• Two and Three-Cell Alkaline, Lithium Ultimate and
NiMH/NiCd Portable Products
• Single-Cell Li-Ion to 5V, 12V or 24V Converters
• LCD Bias Supply for Portable Applications
• Camera Phone Flash
• Portable Medical Equipment
• Hand-Held Instruments
General Description
The MCP1663 device is a compact, high-efficiency,
fixed-frequency, non-synchronous step-up DC-DC
converter which integrates a 36V, 400 mNMOS
switch. It provides a space-efficient high-voltage
step-up power supply solution for applications powered
by either two-cell or three-cell alkaline, Ultimate
Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer
batteries.
The integrated switch is protected by the 1.8A
cycle-by-cycle inductor peak current limit operation.
There is an output overvoltage protection which turns
off switching in case the feedback resistors are
accidentally disconnected or the feedback pin is
short-circuited to GND.
Low-voltage technology allows the regulator to start-up
without high inrush current or output voltage overshoot
from a low-voltage input. The device features a UVLO
which avoids start-up and operation with low inputs or
discharged batteries for two cell-powered applications.
For standby applications (EN = GND), the device stops
switching, enters sleep mode and consumes 0.3 µA
(typical) of input current.
MCP1663 is easy to use and allows creating classic
boost, SEPIC or flyback DC-DC converters within a
small Printed Circuit Board (PCB) area. All
compensation and protection circuitry is integrated to
minimize the number of external components. Ceramic
input and output capacitors are used.
Package Types
MCP1663
SOT-23
SW 1
GND 2
VFB 3
5 VIN
4 EN
MCP1663
2x3 TDFN*
VFB 1
8 EN
SGND 2 EP 7 PGND
SW 3 9 6 NC
NC 4
5 VIN
* Includes Exposed Thermal Pad (EP); see Table 3-1.
2015 Microchip Technology Inc.
DS20005406A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1663 Datasheet

High-Voltage Integrated Switch PWM Boost Regulator

No Preview Available !

MCP1663
Typical Applications
VIN
3.6V to 4.5V
CIN
4.7 - 10 µF
+
1 X LI-ION
OR
3 X ALKALINE
-
ON
OFF
L
4.7 µH
D
PMEG2010
VOUT
12V, 250 mA
SW
VIN
MCP1663
VFB
EN GND
RTOP
1.05 M
RBOT
120 k
COUT
4.7 - 10 µF
L
10 µH
D
MBRM140
VOUT
24V, 100 mA
VIN
3.6V to 4.5V
+
1 X LI-ION
OR
3 X ALKALINE
-
CIN
10 µF
ON
OFF
SW
VIN
MCP1663
VFB
EN GND
RTOP
1.05 M
RBOT
56 k
COUT
10 - 22 µF
450
400
350
VOUT = 12V
300
250
200
VOUT = 24V
150
100
50
0
2.4 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
VIN (V)
Maximum Output Current vs. Input Voltage
DS20005406A-page 2
2015 Microchip Technology Inc.


Part Number MCP1663
Description High-Voltage Integrated Switch PWM Boost Regulator
Maker Microchip
Total Page 30 Pages
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