MCP1825 MICROCHIP [Microchip Technology], MCP1825 Datasheet - Page 9

• Manufacturer Part Number: MCP1825
• Description: 500 mA, Low Voltage, Low Quiescent Current LDO Regulator
• Manufacturer: MICROCHIP [Microchip Technology]

AC/DC CHARACTERISTICS (CONTINUED)
© 2008 Microchip Technology Inc.
Electrical Specifications: Unless otherwise noted, V
I
Boldface type applies for junction temperatures, T
Power Supply Ripple Rejection
Ratio
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Note 1:
OUT
= 1 mA, C
2:
3:
4:
5:
6:
7:
Parameters
The minimum V
V
voltage for the adjustable cases. V
TCV
temperature range. V
Load regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is
tested over a load range from 1 mA to the maximum specified output current.
Dropout voltage is defined as the input-to-output voltage differential at which the output voltage drops 2% below its
nominal value that was measured with an input voltage of V
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
dissipation will cause the device operating junction temperature to exceed the maximum +150°C rating. Sustained
junction temperatures above 150°C can impact 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.
R
IN
is the nominal regulator output voltage for the fixed cases. V
OUT
= C
OUT
= (V
OUT-HIGH
= 4.7 µF (X7R Ceramic), T
IN
must meet two conditions: V
OUT-LOW
– V
OUT-LOW
PSRR
ΔT
Sym
T
SD
is the lowest voltage measured over the temperature range.
SD
R
) *10
= V
J
6
(Note 7) of -40°C to +125°C
ADJ *
A
/ (V
IN
= +25°C.
= V
Min
R
((R
—
—
—
* ΔTemperature). V
IN
OUT(MAX)
1
≥ 2.1V and V
/R
2
)+1).
Typ
150
+ V
60
10
Figure
MCP1825/MCP1825S
IN
DROPOUT(MAX)
IN
= V
R
4-1.
≥ V
= 1.2V, 1.8V, etc. V
OUT-HIGH
OUT(MAX)
A
, T
Max
OUT(MAX)
J
—
—
—
, θ
JA
, Note 1, V
). Exceeding the maximum allowable power
is the highest voltage measured over the
+ V
+ V
DROPOUT(MAX)
Units
dB
°C
°C
DROPOUT(MAX).
R
R
is the desired set point output
= 1.8V for Adjustable Output,
f = 100 Hz, C
I
V
C
I
V
I
V
OUT
OUT
OUT
INAC
IN
IN
IN
= 0 µF
= 2.8V
= 2.8V
.
= 100 µA,
= 100 µA, V
= 100 µA, V
= 100 mV pk-pk,
Conditions
DS22056B-page 9
OUT
OUT
OUT
= 4.7 µF,
= 1.8V,
= 1.8V,