LP4950C-5V, LP4951C

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SNVS208C – SEPTEMBER 2002 – REVISED APRIL 2013

ELECTRICAL CHARACTERISTICS

(1)

LP4950CZ

LP4951CM

Conditions

Parameter

Units

(1)

Tested

Design

Typ

Limit(2)

Limit(3)

Output Voltage

TJ = 25°C

5.0

5.1

V max

4.9

V min

−25°C ≤ TJ ≤ 85°C

5.15

V max

4.85

V min

Full Operating Temperature Range

5.2

V max

4.8

V min

Output Voltage

100

μA ≤ IL ≤ 100 mA

5.24

V max

TJ ≤ TJMAX

4.76

V min

Output Voltage Temperature

(4)

150

ppm/°C

Coefficient

Line Regulation(5)

6V

≤ VIN ≤ 30V

(6)

0.04

0.2

% max

0.4

% max

Load Regulation(5)

100

μA ≤ IL ≤ 100mA

0.1

0.2

% max

0.3

% max

Dropout Voltage(7)

IL = 100μA

50

80

mV max

150

mV max

IL = 100mA

380

450

mV max

600

mV max

Ground Current

IL = 100μA

75

150

μA max

170

μA max

IL = 100mA

8

15

mA max

19

mA max

Dropout Ground Current

VIN = 4.5V

110

200

μA max

IL = 100μA

230

μA max

Current Limit

VOUT = 0

160

200

mA max

220

mA max

Thermal Regulation

(8)

0.05

0.2

%/W max

Output Noise, 10 Hz to 100 kHz CL = 1μF

430

μV rms

CL = 200μF

160

μV rms

CL = 3.3μF (Bypass = 0.01μF Pins 7

100

μV rms

to 1 (LP4951C)

(1)

Unless otherwise noted all limits specified for VIN = 6V, IL = 100μA and CL = 1μF. Limits appearing in boldface type apply over the

entire junction temperature range for operation. Limits appearing in normal type apply for TA = TJ = 25°C. Additional conditions for the 8-

pin versions are FEEDBACK tied to VTAP, OUTPUT tied to SENSE (VOUT = 5V), and VSHUTDOWN ≤ 0.8V.

(2)

Specified and 100% production tested.

(3)

Specified but not 100% production tested. These limits are not used to calculate outgoing AQL levels.

(4)

Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.

(5)

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.

(6)

Line regulation for the LP4951C is tested at 150°C for IL = 1 mA. For IL = 100μA and TJ = 125°C, line regulation is specified by design to

0.2%. See Typical Performance Characteristics for line regulation versus temperature and load current.

(7)

Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value

measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over

temperature) must be taken into account.

(8)

Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load

or line regulation effects. Specifications are for a 50 mA load pulse at VIN = 30V (1.25W pulse) for T = 10ms.

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