
2002 Microchip Technology Inc.
DS21752A-page 3
MCP1252/3
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings
Power Supply Voltage, V
IN
...............................................6.0V
Voltage on Any Pin w.r.t. GND ............... -0.3V to (V
IN
+ 0.3V)
Output Short Circuit Duration ................................continuous
Storage Temperature Range.........................-65°C to +150°C
Ambient Temperature with Power Applied....-55°C to +125°C
Junction Temperature .................................................+150°C
ESD Ratings:
Human Body Model (1.5 k
in Series with 100 pF
......≥
4 kV
Machine Body Model (200 pF, No Series Resistance
≥
400V
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.
PIN FUNCTION TABLE
ELECTRICAL CHARACTERISTICS
Name
Function
PGOOD
Open-Drain Power GOOD Output
V
OUT
V
IN
GND
Regulated Output Voltage
Power Supply Input
Ground Terminal
C-
Flying Capacitor Negative Terminal
C+
Flying Capacitor Positive Terminal
SHDN
Shutdown Mode, Active-Low Input
SELECT
Output Voltage Select Pin.
(MCP1252-33X50, MCP1253-33X50)
FB
Feedback Input Pin for Adjustable Output
(MCP1252-ADJ, MCP1253-ADJ)
Electrical Specifications:
Unless otherwise specified, all limits are specified for T
A
= -40°C to +85°C, SHDN = V
IN
,
C
IN
= C
OUT
= 10 μF, C
FLY
= 1 μF, I
OUT
= 10 mA. Typical values are for T
A
= +25°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = V
IN
, V
OUT
= 3.3V
Supply Voltage
V
IN
Output Voltage Accuracy
V
OUT
2.1
—
5.5
V
-2.5
+/-0.5
+2.5
%
2.3V
≤
V
IN
< 2.5V, I
OUT
≤
80 mA
2.5V
≤
V
IN
≤
5.5V, I
OUT
≤
120 mA
2.3V
≤
V
IN
< 2.5V
2.5V
≤
V
IN
≤
5.5V
MCP1252-33X50, MCP1253-33X50
Output Current
I
OUT
80
120
100
150
—
mA
mA
SELECT Logic Input Voltage High
V
IH
1.4
—
—
V
Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = GND, V
OUT
= 5.0V
Supply Voltage
V
IN
Output Voltage Accuracy
V
OUT
2.7
—
5.5
V
-2.5
+/-0.5
+2.5
%
2.7V
≤
V
IN
< 3.0V, I
OUT
≤
40 mA
3.0V
≤
V
IN
≤
5.5V, I
OUT
≤
120 mA
2.7V
≤
V
IN
< 3.0V
3.0V
≤
V
IN
≤
5.5V
MCP1252-33X50, MCP1253-33X50
Output Current
I
OUT
40
120
80
150
—
mA
mA
SELECT Logic Input Voltage Low
V
IL
—
—
0.4
V
Adjustable Output - MCP1252-ADJ, MCP1253-ADJ
Supply Voltage
V
IN
V
OUT
V
FB
2.0
—
5.5
V
Output Voltage Adjustment Range
1.5
—
5.5
V
V
OUT(MAX)
< 2 x V
IN
MCP1252-ADJ, MCP1253-ADJ
FB Regulation Voltage
1.18
1.21
1.24
V
ALL DEVICES
Supply Current
I
DD
I
SC
I
SHDN
η
—
60
120
μA
No load
Output Short-Circuit Current
—
200
—
mA
V
OUT
= GND, foldback current
SHDN = 0V
Shutdown Current
—
0.1
2.0
μA
Power Efficiency
—
81
68
—
%
%
V
IN
= 3.0V, V
OUT
= 5V
V
IN
= 3.6V, V
OUT
= 5V
I
OUT
=120 mA
SHDN Logic Input Voltage Low
V
IL
V
IH
V
TH
V
HYS
—
—
0.4
V
SHDN Logic Input Voltage High
1.4
—
—
V
PGOOD Threshold Voltage
—
0.93V
OUT
0.04V
OUT
—
V
PGOOD Hysteresis
—
—
V