MCP1702
250 mA Low Quiescent Current LDO Regulator
Features
•
•
•
•
•
•
•
2.0 µA Quiescent Current (typical)
Input Operating Voltage Range: 2.7V to 13.2V
250 mA Output Current for Output Voltages
≥
2.5V
200 mA Output Current for Output Voltages < 2.5V
Low Dropout (LDO) voltage
- 625 mV typical @ 250 mA (V
OUT
= 2.8V)
0.4% Typical Output Voltage Tolerance
Standard Output Voltage Options:
- 1.2V, 1.5V, 1.8V, 2.5V, 2.8V,
3.0V, 3.3V, 4.0V, 5.0V
Output voltage range 1.2V to 5.5V in 0.1V
Increments (50 mV increments available upon
request)
Stable with 1.0 µF to 22 µF Output Capacitor
Short-Circuit Protection
Overtemperature Protection
Description
The MCP1702 is a family of CMOS low dropout (LDO)
voltage regulators that can deliver up to 250 mA of
current while consuming only 2.0 µA of quiescent
current (typical). The input operating range is specified
from 2.7V to 13.2V, making it an ideal choice for two to
six primary cell battery-powered applications, 9V
alkaline and one or two cell Li-Ion-powered
applications.
The MCP1702 is capable of delivering 250 mA with
only 625 mV (typical) of input to output voltage
differential (V
OUT
= 2.8V). The output voltage tolerance
of the MCP1702 is typically ±0.4% at +25°C and ±3%
maximum over the operating junction temperature
range of -40°C to +125°C. Line regulation is ±0.1%
typical at +25°C.
Output voltages available for the MCP1702 range from
1.2V to 5.0V. The LDO output is stable when using only
1 µF of output capacitance. Ceramic, tantalum or
aluminum electrolytic capacitors can all be used for
input
and
output.
Overcurrent
limit
and
overtemperature shutdown provide a robust solution
for any application.
Package options include the SOT-23A, SOT-89-3, and
TO-92.
•
•
•
•
Applications
•
•
•
•
•
•
•
•
•
•
•
•
•
Battery-powered Devices
Battery-powered Alarm Circuits
Smoke Detectors
CO
2
Detectors
Pagers and Cellular Phones
Smart Battery Packs
Low Quiescent Current Voltage Reference
PDAs
Digital Cameras
Microcontroller Power
Solar-Powered Instruments
Consumer Products
Battery Powered Data Loggers
Package Types
3-Pin SOT-23A
V
IN
3
MCP1702
1
2
MCP1702
1
2
3
3-Pin SOT-89
V
IN
GND V
OUT
GND V
IN
V
OUT
Related Literature
• AN765,
“Using Microchip’s Micropower LDOs”,
DS00765, Microchip Technology Inc., 2002
• AN766,
“Pin-Compatible CMOS Upgrades to
BiPolar LDOs”,
DS00766,
Microchip Technology Inc., 2002
• AN792,
“A Method to Determine How Much
Power a SOT-23 Can Dissipate in an Application”,
DS00792, Microchip Technology Inc., 2001
3-Pin TO-92
123
Bottom
View
GND V
IN
V
OUT
©
2007 Microchip Technology Inc.
DS22008B-page 1
MCP1702
Functional Block Diagrams
MCP1702
V
IN
V
OUT
Error Amplifier
+V
IN
Voltage
Reference
-
+
Overcurrent
Overtemperature
GND
Typical Application Circuits
MCP1702
V
IN
9V
Battery
+
C
IN
1 µF Ceramic
V
OUT
V
IN
GND
C
OUT
1 µF Ceramic
V
OUT
3.3V
I
OUT
50 mA
DS22008B-page 2
©
2007 Microchip Technology Inc.
MCP1702
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
DD
...............................................................................+14.5V
All inputs and outputs w.r.t. .............(V
SS
-0.3V) to (V
IN
+0.3V)
Peak Output Current ...................................................500 mA
Storage temperature .....................................-65°C to +150°C
Maximum Junction Temperature ................................... 150°C
Operating Junction Temperature...................-40°C to +125°C
ESD protection on all pins (HBM;MM)...............
≥
4 kV;
≥
400V
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, all limits are established for V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
,
Note 1,
I
LOAD
= 100 µA, C
OUT
= 1 µF (X7R), C
IN
= 1 µF (X7R), T
A
= +25°C.
Boldface
type applies for junction temperatures, T
J
of -40°C to +125°C.
(Note 7)
Parameters
Input / Output Characteristics
Input Operating Voltage
Input Quiescent Current
Maximum Output Current
V
IN
I
q
I
OUT_mA
2.7
—
250
50
100
150
200
Output Short Circuit Current
I
OUT_SC
—
—
2.0
—
100
130
200
250
400
13.2
5
—
—
—
—
—
—
V
µA
mA
mA
mA
mA
mA
mA
Note 1
I
L
= 0 mA
For V
R
≥
2.5V
For V
R
< 2.5V, V
IN
≥
2.7V
For V
R
< 2.5V, V
IN
≥
2.95V
For V
R
< 2.5V, V
IN
≥
3.2V
For V
R
< 2.5V, V
IN
≥
3.45V
V
IN
= V
IN(MIN)
(Note
1),
V
OUT
= GND,
Current (average current) measured
10 ms after short is applied.
Note 2
Note 3
(V
OUT(MAX)
+ V
DROPOUT(MAX)
)
≤
V
IN
≤
13.2V,
(Note 1)
I
L
= 1.0 mA to 250 mA for V
R
≥
2.5V
I
L
= 1.0 mA to
200
mA for V
R
<
2.5V,
V
IN
= 3.45V
Note 4
Sym
Min
Typ
Max
Units
Conditions
Output Voltage Regulation
V
OUT
Temperature Coefficient
Line Regulation
Load Regulation
V
OUT
TCV
OUT
ΔV
OUT
/
(V
OUT
XΔV
IN
)
V
R
-3.0%
V
R
-2.0%
—
-0.3
-2.5
V
R
±0.4
%
50
±0.1
±1.0
V
R
+3.0%
V
R
+2.0%
150
+0.3
+2.5
V
ppm/°C
%/V
%
Δ
V
OUT
/V
OUT
Note 1:
2:
3:
4:
5:
6:
7:
The minimum V
IN
must meet two conditions: V
IN
≥
2.7V and V
IN
≥
V
OUT(MAX)
+ V
DROPOUT(MAX)
.
V
R
is the nominal regulator output voltage. For example: V
R
= 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, or 5.0V.
The input voltage V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
or V
IN
= 2.7V (whichever is greater); I
OUT
= 100 µA.
TCV
OUT
= (V
OUT-HIGH
- V
OUT-LOW
) *10
6
/ (V
R
*
ΔTemperature),
V
OUT-HIGH
= highest voltage measured over the
temperature range. V
OUT-LOW
= lowest voltage measured over the temperature range.
Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Changes in output
voltage due to heating effects are determined using thermal regulation specification TCV
OUT
.
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its measured
value with an applied input voltage of V
OUT(MAX)
+ V
DROPOUT(MAX)
or 2.7V, whichever is greater.
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air (i.e., T
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power
dissipation will cause the device operating junction temperature to exceed the maximum 150°C rating. Sustained
junction temperatures above 150°C can impact the device reliability.
The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the
desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the
ambient temperature is not significant.
©
2007 Microchip Technology Inc.
DS22008B-page 3
MCP1702
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications:
Unless otherwise specified, all limits are established for V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
,
Note 1,
I
LOAD
= 100 µA, C
OUT
= 1 µF (X7R), C
IN
= 1 µF (X7R), T
A
= +25°C.
Boldface
type applies for junction temperatures, T
J
of -40°C to +125°C.
(Note 7)
Parameters
Dropout Voltage
(Note 1, Note 5)
Sym
V
DROPOUT
Min
—
—
—
—
—
Output Delay Time
Output Noise
Power Supply Ripple
Rejection Ratio
Thermal Shutdown Protection
Note 1:
2:
3:
4:
5:
6:
T
DELAY
e
N
PSRR
—
—
—
Typ
330
525
625
750
—
1000
8
44
—
Max
650
725
975
1100
—
—
Units
mV
mV
mV
mV
mV
µs
Conditions
I
L
= 250 mA, V
R
= 5.0V
I
L
= 250 mA, 3.3V
≤
V
R
< 5.0V
I
L
= 250 mA, 2.8V
≤
V
R
< 3.3V
I
L
= 250 mA, 2.5V
≤
V
R
< 2.8V
V
R
< 2.5V, See Maximum Output
Current Parameter
V
IN
= 0V to 6V, V
OUT
= 90% V
R
R
L
= 50Ω resistive
f = 100 Hz, C
OUT
= 1 µF, I
L
= 50 mA,
V
INAC
= 100 mV pk-pk, C
IN
= 0 µF,
V
R
= 1.2V
µV/(Hz)
1/2
I
L
= 50 mA, f = 1 kHz, C
OUT
= 1 µF
dB
T
SD
—
150
—
°C
7:
The minimum V
IN
must meet two conditions: V
IN
≥
2.7V and V
IN
≥
V
OUT(MAX)
+ V
DROPOUT(MAX)
.
V
R
is the nominal regulator output voltage. For example: V
R
= 1.2V, 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, or 5.0V.
The input voltage V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
or V
IN
= 2.7V (whichever is greater); I
OUT
= 100 µA.
TCV
OUT
= (V
OUT-HIGH
- V
OUT-LOW
) *10
6
/ (V
R
*
ΔTemperature),
V
OUT-HIGH
= highest voltage measured over the
temperature range. V
OUT-LOW
= lowest voltage measured over the temperature range.
Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Changes in output
voltage due to heating effects are determined using thermal regulation specification TCV
OUT
.
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its measured
value with an applied input voltage of V
OUT(MAX)
+ V
DROPOUT(MAX)
or 2.7V, whichever is greater.
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air (i.e., T
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power
dissipation will cause the device operating junction temperature to exceed the maximum 150°C rating. Sustained
junction temperatures above 150°C can impact the device reliability.
The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the
desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the
ambient temperature is not significant.
TEMPERATURE SPECIFICATIONS (NOTE 1)
Parameters
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistance
Thermal Resistance, 3L-SOT-23A
θ
JA
θ
JC
Thermal Resistance, 3L-SOT-89
θ
JA
θ
JC
Thermal Resistance, 3L-TO-92
Note 1:
θ
JA
θ
JC
—
—
—
—
—
—
336
110
52
10
131.9
66.3
—
—
—
—
—
—
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
EIA/JEDEC JESD51-7
FR-4 0.063 4-Layer Board
EIA/JEDEC JESD51-7
FR-4 0.063 4-Layer Board
T
J
T
J
T
A
-40
-40
-65
+125
+125
+150
°C
°C
°C
Sym
Min
Typ
Max
Units
Conditions
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction
temperature and the thermal resistance from junction to air (i.e., T
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power
dissipation will cause the device operating junction temperature to exceed the maximum 150°C rating. Sustained
junction temperatures above 150°C can impact the device reliability.
DS22008B-page 4
©
2007 Microchip Technology Inc.
MCP1702
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note:
Unless otherwise indicated: V
R
= 2.8V, C
OUT
= 1 µF Ceramic (X7R), C
IN
= 1 µF Ceramic (X7R), I
L
= 100 µA,
T
A
= +25°C, V
IN
= V
OUT(MAX)
+ V
DROPOUT(MAX)
.
Note:
Junction Temperature (T
J
) is approximated by soaking the device under test to an ambient temperature equal to the desired junction
temperature. The test time is small enough such that the rise in Junction temperature over the Ambient temperature is not significant.
5.00
Quiescent Current (µA)
4.00
3.00
2.00
1.00
0.00
2
4
6
8
10
12
14
Input Voltage (V)
-45°C
+25°C
+90°C
V
OUT
= 1.2V
+130°C
0°C
120.00
GND Current (µA)
100.00
80.00
60.00
40.00
20.00
0.00
0
40
Temperature = +25°C
V
OUT
= 1.2V
V
IN
= 2.7V
80
120
160
200
Load Current (mA)
FIGURE 2-1:
Voltage.
5.00
Quiescent Current (µA)
4.00
3.00
2.00
1.00
0.00
3
5
-45°C
+25°C
+90°C
Quiescent Current vs. Input
FIGURE 2-4:
Current.
120.00
GND Current (µA)
100.00
80.00
60.00
40.00
20.00
0.00
Ground Current vs. Load
V
OUT
= 2.8V
+130°C
Temperature = +25°C
V
OUT
= 5.0V
V
IN
= 6.0V
0°C
V
OUT
= 2.8V
V
IN
= 3.8V
7
9
11
13
0
50
100
150
200
250
Input Voltage (V)
Load Current (mA)
FIGURE 2-2:
Voltage.
5.00
Quiescent Current (µA)
4.00
3.00
Quiescent Current vs.Input
FIGURE 2-5:
Current.
3.00
Quiescent Current (µA)
2.50
2.00
1.50
1.00
0.50
0.00
V
OUT
= 2.8V
V
IN
= 3.8V
Ground Current vs. Load
V
OUT
= 5.0V
+130°C
V
OUT
= 5.0V
V
IN
= 6.0V
I
OUT
= 0 mA
+90°C
V
OUT
= 1.2V
V
IN
= 2.7V
2.00
-45°C
+25°C
0°C
1.00
6
7
8
9
10
11
12
13
14
Input Voltage (V)
-45
-20
5
30
55
80
105
130
Junction Temperature (°C)
FIGURE 2-3:
Voltage.
Quiescent Current vs.Input
FIGURE 2-6:
Quiescent Current vs.
Junction Temperature.
©
2007 Microchip Technology Inc.
DS22008B-page 5
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