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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1653 Datasheet

(MCP1650 - MCP1653) 750 kHz Boost Controller

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MCP1653 pdf
M MCP1650/51/52/53
750 kHz Boost Controller
Features
• Output Power Capability Over 5 Watts
• Output Voltage Capability From 3.3V to Over
100V
• 750 kHz Gated Oscillator Switching Frequency
www.DataSheet4U.com• Adaptable Duty Cycle for Battery or Wide-Input,
Voltage-Range Applications
• Input Voltage Range: 2.0V to 5.5V
• Capable of SEPIC and Flyback Topologies
• Shutdown Control with IQ < 0.1 µA (Typical)
• Low Operating Quiescent Current: IQ = 120 µA
• Voltage Feedback Tolerance (0.6%, Typical)
• Popular MSOP-8 Package
• Peak Current Limit Feature
• Two Undervoltage Lockout (UVLO) Options:
- 2.0V or 2.55V
• Operating Temperature Range: -40°C to +125°C
Applications
• High-Power Boost Applications
• High-Voltage Bias Supplies
• White LED Drivers and Flashlights
• Local 3.3V to 5.0V Supplies
• Local 3.3V to 12V Supplies
• Local 5.0V to 12V Supplies
• LCD Bias Supply
Package Types
EXT
GND
CS
FB
EXT
GND
CS
FB
8-Pin MSOP
18
27
36
45
VIN
NC
NC
SHDN
8-Pin MSOP
18
27
36
45
VIN
PG
NC
SHDN
Description
The MCP1650/51/52/53 is a 750 kHz gated oscillator
boost controller packaged in an 8 or 10-pin MSOP
package. Developed for high-power, portable applica-
tions, the gated oscillator controller can deliver 5 watts
of power to the load while consuming only 120 µA of
quiescent current at no load. The MCP1650/51/52/53
can operate over a wide input voltage range (2.0V to
5.5V) to accommodate multiple primary-cell and single-
cell Li-Ion battery-powered applications, in addition to
2.8V, 3.3V and 5.0V regulated input voltages.
An internal 750 kHz gated oscillator makes the
MCP1650/51/52/53 ideal for space-limited designs.
The high switching frequency minimizes the size of the
external inductor and capacitor, saving board space
and cost. The internal oscillator operates at two differ-
ent duty cycles depending on the level of the input volt-
age. By changing duty cycle in this fashion, the peak
input current is reduced at high input voltages, reducing
output ripple voltage and electrical stress on power
train components. When the input voltage is low, the
duty cycle changes to a larger value in order to provide
full-power capability at a wide input voltage range
typical of battery-powered, portable applications.
The MCP1650/51/52/53 was designed to drive external
switches directly using internal low-resistance
MOSFETs.
Additional features integrated on the MCP1650/51/52/
53 family include peak input current limit, adjustable
output voltage/current, low battery detection and
power-good indication.
EXT
GND
CS
FB
8-Pin MSOP
18
27
36
45
VIN
LBO
LBI
SHDN
EXT
GND
CS
FB
NC
10-Pin MSOP
1 10
29
38
47
56
VIN
PG
LBO
LBI
SHDN
2004 Microchip Technology Inc.
DS21876A-page 1



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1653 Datasheet

(MCP1650 - MCP1653) 750 kHz Boost Controller

No Preview Available !

MCP1653 pdf
MCP1650/51/52/53
MCP1650 Block Diagram
www.DataSheet4U.com
MCP1650
VIN
+
Internal Osc. with
2 fixed
VDUTY
Duty
Cycles
VHIGH
DC
DC
=
=
80%
56%
VVIINN
<
>
3.8V
3.8V
VLOW
VHIGH
1.2+2- V
1R 0.-122V
9R
ISNS
Osc. Ref
Soft-
Start
ON/
VIN
VDUTY
OFF
OSC. OUT
Current Limit
CS
V+
REF -
VLOW
GND
SHDN
ON/OFF
Control
FB Voltage Feedback
+-
VREF
1.22V
VIN
S Pulse
R Latch Q
DR
EXT
DS21876A-page 2
2004 Microchip Technology Inc.



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP1653 Datasheet

(MCP1650 - MCP1653) 750 kHz Boost Controller

No Preview Available !

MCP1653 pdf
MCP1650/51/52/53
MCP1651/2/3 Block Diagram
MCP1650/51/52/53
MCP1650 - No Features
MCP1651 - Low Battery Detection
MCP1652 - Power Good Indication
MCP1653 - Low Battery Detection and PG
MCP1653 - LBI and PG Features
MCP1651 - Low Battery Detection
www.DataSheet4U.com
VIN Low Battery
LBI
1.22 Vref +
Comparator
-
LBO
Vin
SHDN
VFB
MCP1650
Vref. (1.22V)
MCP1652 - Power Good Indication
VIN
85% of Vref
+
- Power Good
Comparators
+
A - 115% of Vref
CS
EXT
GND
PG
2004 Microchip Technology Inc.
DS21876A-page 3




Part Number MCP1653
Description (MCP1650 - MCP1653) 750 kHz Boost Controller
Maker Microchip Technology
Total Page 28 Pages
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