M
Features
MCP1650/51/52/53
750 kHz Boost Controller
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.
• Output Power Capability Over 5 Watts
• Output Voltage Capability From 3.3V to Over
100V
• 750 kHz Gated Oscillator Switching Frequency
• 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 I
Q
< 0.1 µA (Typical)
• Low Operating Quiescent Current: I
Q
= 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
8-Pin MSOP
MCP1650
EXT
GND
CS
FB
1
2
3
4
8
7
6
5
V
IN
NC
NC
SHDN
EXT
GND
CS
FB
8-Pin MSOP
MCP1651
1
2
3
4
8
7
6
5
V
IN
LBO
LBI
SHDN
8-Pin MSOP
MCP1652
EXT
GND
CS
FB
1
2
3
4
8
7
6
5
V
IN
PG
NC
SHDN
EXT
GND
CS
FB
NC
10-Pin MSOP
1
2
3
4
5
10
9
8
7
6
V
IN
PG
LBO
LBI
SHDN
2004 Microchip Technology Inc.
MCP1653
DS21876A-page 1
MCP1650/51/52/53
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
Absolute Maximum Ratings †
V
IN TO
GND........................................................... 6.0V
CS,FB,LBI,LBO,SHDN,PG,EXT............ GND – 0.3V to
V
IN
+ 0.3V
Current at EXT pin ................................................ ±1A
Storage temperature .......................... -65°C to +150°C
Operating Junction Temperature........ -40°C to +125°C
ESD protection on all pins
........................... ≥
4 kV HBM
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise noted, all parameters apply at V
IN
= +2.7V to +5.5V, SHDN = High,
T
J
= -40°C to +125°C. Typical values apply for V
IN
= 3.3V, T
A
+25°C.
Parameters
Input Characteristics
Supply Voltage
Undervoltage Lockout
(S Option)
Under Voltage Lockout
(R Option)
Undervoltage Hysteresis
Shutdown Supply Current
Quiescent Supply Current
Soft Start Time
Feedback Characteristics
Feedback Voltage
Feedback Comparator
Hysteresis
Feedback Input Bias Current
Current Sense Input
Current Sense Threshold
Delay from Current Sense to
Output
Ext Drive
EXT Driver ON Resistance
(High Side)
EXT Driver ON Resistance
(Low Side)
Oscillator Characteristics
Switching Frequency
Low Duty Cycle Switch-Over
Voltage
Duty Cycle Switch Voltage
Hysteresis
Low Duty Cycle
High Duty Cycle
F
OSC
V
LowDuty
DC
Hyst
DC
LOW
DC
HIGH
650
—
—
50
72
750
3.8
92
56
80
850
—
—
62
88
kHz
V
mV
%
%
V
IN
rising edge
R
HIGH
R
LOW
—
—
8
4
18
12
Ω
Ω
I
SNS-TH
T
dly_ISNS
75
—
114
80
155
—
mV
ns
V
FB
V
HYS
I
FBlk
1.18
—
-50
1.22
12
—
1.26
23
50
V
mV
nA
V
FB
< 1.3V
All conditions
V
IN
UVLO
UVLO
UVLO
HYST
I
SHD
I
Q
T
SS
2.7
2.4
1.85
—
—
—
—
—
2.55
2.0
117
0.001
120
500
5.5
2.7
2.15
—
1
220
—
V
V
V
mV
µA
µA
µs
SHDN = GND
EXT = Open
V
IN
rising edge
V
IN
rising edge
Sym
Min
Typ
Max
Units
Conditions
2004 Microchip Technology Inc.
DS21876A-page 5
ADI Reference Circuit
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