English
Language : 

LP2951-33-Q1 Datasheet, PDF (4/30 Pages) Texas Instruments – Adjustable Micropower Voltage Regulators With Shutdown
◁
LP2951-33-Q1, LP2951-50-Q1
SLVSAW6E – JUNE 2011 – REVISED NOVEMBER 2014
6.3 Recommended Operating Conditions
VIN
Supply input voltage
TA
Operating temperature
(1) Minimum VIN is the greater of:
(a) 2 V (25°C), 2.3 V (over temperature), or
(b) VOUT(MAX) + Dropout (Max) at rated IL
6.4 Thermal Information
THERMAL METRIC
RθJA
RθJC(top)
RθJB
ψJT
ψJB
RθJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
www.ti.com
MIN
See (1)
–40
NOM
MAX
30
125
UNIT
V
°C
LP2951-30-Q1,
LP2951-50-Q1
DRG
8 PINS
55.7
66.5
30.2
1.1
30.4
10
LP2951-50-Q1
D
8 PINS
121.6
69.8
61.9
22.2
61.4
n/a
UNIT
°C/W
6.5 Electrical Characteristics
VIN = VOUT (nominal) + 1 V, IL = 100 μA, CL = 1 μF (5-V versions) or CL = 2.2 μF (3.3-V versions),
8-pin version: FEEDBACK tied to VTAP, OUTPUT tied to SENSE, VSHUTDOWN ≤ 0.7 V
PARAMETER
TEST CONDITIONS
TA
MIN
3.3-V VERSION (LP2951-33-Q1)
VOUT
Output voltage
IL = 100 μA
25°C
–40°C to 125°C
3.267
3.234
5-V VERSION (LP2951-50-Q1)
VOUT
Output voltage
IL = 100 μA
25°C
–40°C to 125°C
4.950
4.900
ALL VOLTAGE OPTIONS
Output voltage temperature
coefficient (1)
IL = 100 μA
–40°C to 125°C
Line regulation(2)
VIN = [VOUT(NOM) + 1 V] to 30 V
25°C
–40°C to 125°C
Load regulation(2)
IL = 100 μA to 100 mA
25°C
–40°C to 125°C
VIN – VOUT Dropout voltage(3)
IL = 100 μA
IL = 100 mA
25°C
–40°C to 125°C
25°C
–40°C to 125°C
IGND
GND current
IL = 100 μA
IL = 100 mA
25°C
–40°C to 125°C
25°C
–40°C to 125°C
Dropout ground current
VIN = VOUT(NOM) – 0.5 V,
IL = 100 μA
25°C
–40°C to 125°C
Current limit
VOUT = 0 V
25°C
–40°C to 125°C
TYP
3.3
3.3
5
5
20
0.03
0.04%
50
380
75
8
110
160
MAX UNIT
3.333
V
3.366
5.050
V
5.100
100 ppm/°C
0.2
%/V
0.4
0.2%
0.3%
80
150
mV
450
600
120
μA
140
12
mA
14
170
μA
200
200
mA
220
(1) Output or reference voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
(2) Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
(3) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 100 mV, below the value measured at 1-V
differential. The minimum input supply voltage of 2 V (2.3 V over temperature) must be observed.
4
Submit Documentation Feedback
Copyright © 2011–2014, Texas Instruments Incorporated
Product Folder Links: LP2951-33-Q1 LP2951-50-Q1
 ▷