LP2985 Datasheet, PDF (4/24 Pages) National Semiconductor (TI) – Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors

LP2985
150-mA LOW-NOISE LOW-DROPOUT REGULATOR
WITH SHUTDOWN
SLVS522F – JULY 2004 – REVISED AUGUST 2005
Absolute Maximum Ratings⁽¹⁾
over virtual junction temperature range (unless otherwise noted)
www.ti.com
V_IN
V_ON/OFF
V_IN – V_OUT
I_O
θ_JA
T_J
T_stg
Continuous input voltage range
ON/OFF input voltage range
Output voltage range⁽²⁾
Input/output voltage differential range⁽³⁾
Output current⁽⁴⁾
Package thermal impedance⁽⁴⁾⁽⁵⁾
Operating virtual junction temperature
Storage temperature range
MIN
MAX
–0.3
16
–0.3
16
–0.3
9
–0.3
16
Internally limited
(short-circuit protected)
206
150
–65
150
UNIT
V
V
V
V
°C/W
°C
°C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) If load is returned to a negative power supply in a dual-supply system, the output must be diode clamped to GND.
(3) The PNP pass transistor has a parasitic diode connected between the input and output. This diode normally is reverse biased
(V_IN > V_OUT), but will be forward biased if the output voltage exceeds the input voltage by a diode drop (see Application Information for
more details).
(4) Maximum power dissipation is a function of T_J(max), θ_JA, and T_A. The maximum allowable power dissipation at any allowable ambient
temperature is P_D = (T_J(max) – T_A)/θ_JA. Operating at the absolute maximum T_J of 150°C can affect reliability.
(5) The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions
V_IN
V_ON/OFF
I_OUT
T_J
Supply input voltage
ON/OFF input voltage
Output current
Virtual junction temperature
MIN
2.2 ⁽¹⁾
0
–40
(1) Recommended minimum V_IN is the greater of 2.5 V or V_OUT(max) + rated dropout voltage (max) for operating I_L.
MAX
16
V_IN
150
125
UNIT
V
V
mA
°C
4