MCP1824ST-3302E Datasheet, PDF (9/34 Pages) Microchip Technology – 300 mA, Low Voltage, Low Quiescent Current LDO Regulator

MCP1824/MCP1824S
AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise noted, V_IN = V_OUT(MAX) + V_DROPOUT(MAX), Note 1, V_R = 1.8V for Adjustable Output,
I_OUT = 1 mA, C_IN = C_OUT = 4.7 µF (X7R Ceramic), T_A = +25°C.
Boldface type applies for junction temperatures, T_J (Note 7) of -40°C to +125°C
Parameters
Sym
Min
Typ
Max
Units
Conditions
Detect Threshold to PWRGD
T_VDET-PWRGD
—
200
—
µs
V_OUT = V_{PWRGD_TH} + 50 mV
Active Time Delay
to V_{PWRGD_TH} - 50 mV
Shutdown Input
Logic High Input
Logic Low Input
SHDN Input Leakage Current
V_SHDN-HIGH
V_SHDN-LOW
SHDN_ILK
45
—
—
%V_IN V_IN = 2.1V to 6.0V
—
—
15
%V_IN V_IN = 2.1V to 6.0V
-0.1
±0.001
+0.1
µA V_IN = 6V, SHDN =V_IN,
SHDN = GND
AC Performance
Output Delay From SHDN
T_OR
—
100
—
µs SHDN = GND to V_IN,
V_OUT = GND to 95% V_R
Output Noise
e_N
—
2.0
—
µV/√Hz I_OUT = 200 mA, f = 1 kHz,
C_OUT = 10 µF (X7R Ceramic),
V_OUT = 2.5V
Power Supply Ripple Rejection
Ratio
PSRR
—
55
—
dB f = 100 Hz,
I_OUT = 10 mA,
V_INAC = 200 mV pk-pk,
C_IN = 0 µF
Thermal Shutdown Temperature
T_SD
—
150
—
°C I_OUT = 100 µA, V_OUT = 1.8V,
V_IN = 2.8V
Thermal Shutdown Hysteresis
ΔT_SD
—
10
—
°C I_OUT = 100 µA, V_OUT = 1.8V,
V_IN = 2.8V
Note 1:
2:
3:
4:
The minimum V_IN must meet two conditions: V_IN ≥ 2.1V and V_IN ≥ V_OUT(MAX) + V_{DROPOUT(MAX).}
V_R is the nominal regulator output voltage for the fixed cases. V_R = 1.2V, 1.8V, etc. V_R is the desired set point output
voltage for the adjustable cases. V_R = V_{ADJ *} ((R₁/R₂)+1). Figure 4-1.
TCV_OUT = (V_OUT-HIGH – V_OUT-LOW) *10⁶ / (V_R * ΔTemperature). V_OUT-HIGH is the highest voltage measured over the
temperature range. V_OUT-LOW is the lowest voltage measured over the temperature range.
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.
5: 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_IN = V_OUT(MAX) + V_DROPOUT(MAX).
6: 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 device reliability.
7: 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.
DS22070A-page 9