LP2951CN-3.3 参数 Datasheet PDF下载

LP2950, LP2951, NCV2951

ELECTRICAL CHARACTERISTICS (continued)

(V

in

= V

O

+ 1.0 V, I

O

= 100

mA,

C

O

= 1.0

mF,

T

A

= 25C [Note 8], unless otherwise noted.)

Characteristic

Line Regulation (V

in

= V

O(nom)

+1.0 V to 30 V) (Note 9)

LP2950C−XX/LP2951C/LP2951C−XX/NCV2951C*

LP2950AC−XX/LP2951AC/LP2951AC−XX/NCV2951AC*

Load Regulation (I

O

= 100

mA

to 100 mA)

LP2950C−XX/LP2951C/LP2951C−XX/NCV2951C*

LP2950AC−XX/LP2951AC/LP2951AC−XX/NCV2951AC*

Dropout Voltage

I

O

= 100

mA

I

O

= 100 mA

Supply Bias Current

I

O

= 100

mA

I

O

= 100 mA

Dropout Supply Bias Current (V

in

= V

O(nom)

−

0.5 V,

I

O

= 100

mA)

(Note 9)

Current Limit (V

O

Shorted to Ground)

Thermal Regulation

Output Noise Voltage (10 Hz to 100 kHz) (Note 10)

C

L

= 1.0

mF

C

L

= 100

mF

LP2951A/LP2951AC Only

Reference Voltage (T

A

= 25C)

LP2951C/LP2951C−XX/NCV2951C*

LP2951AC/LP2951AC−XX/NCV2951AC*

Reference Voltage (T

A

=

−

40 to +125C)

LP2951C/LP2951C−XX/NCV2951C*

LP2951AC/LP2951AC−XX/NCV2951AC*

Reference Voltage (T

A

=

−

40 to +125C)

I

O

= 100

mA

to 100 mA, V

in

= 23 to 30 V

LP2951C/LP2951C−XX/NCV2951C*

LP2951AC/LP2951AC−XX/NCV2951AC*

Feedback Pin Bias Current

Error Comparator

Output Leakage Current (V

OH

= 30 V)

Output Low Voltage (V

in

= 4.5 V, I

OL

= 400

mA)

Upper Threshold Voltage (V

in

= 6.0 V)

Lower Threshold Voltage (V

in

= 6.0 V)

Hysteresis (V

in

= 6.0 V)

Shutdown Input

Input Logic Voltage

Logic “0” (Regulator “On”)

Logic “1” (Regulator “Off”)

Shutdown Pin Input Current

V

shtdn

= 2.4 V

V

shtdn

= 30 V

Regulator Output Current in Shutdown Mode

(V

in

= 30 V, V

shtdn

= 2.0 V, V

O

= 0, Pin 6 Connected to Pin 7)

V

shtdn

V

0

2.0

−

−

−

−

−

35

450

3.0

0.7

30

50

600

10

mA

I

lkg

V

OL

V

thu

V

thl

V

hy

−

−

40

−

−

0.01

150

45

60

15

1.0

250

−

95

−

mA

mV

mV

mV

mV

V

ref

V

1.210

1.220

1.200

1.200

1.235

1.235

−

−

1.260

1.250

V

1.270

1.260

V

1.185

1.190

I

FB

−

−

−

15

1.285

1.270

40

nA

Symbol

Reg

line

Min

−

−

−

−

−

−

−

−

−

−

−

−

−

Typ

0.08

0.04

0.13

0.05

30

350

93

4.0

110

220

0.05

126

56

Max

0.20

0.10

%

0.20

0.10

mV

80

450

120

12

170

300

0.20

−

−

mA

mA

mA

mA

%/W

mVrms

Unit

%

Reg

load

V

I

−

V

O

I

CC

I

CCdropout

I

Limit

Reg

thermal

V

n

V

ref

V

ref

I

shtdn

I

off

mA

6. The Junction−to−Ambient Thermal Resistance is determined by PCB copper area per Figure 29.

7. ESD data available upon request.

8. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.

9. V

O(nom)

is the part number voltage option.

10. Noise tests on the LP2951 are made with a 0.01

mF

capacitor connected across Pins 7 and 1.

*NCV prefix is for automotive and other applications requiring site and change control.

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