LP3963 datasheet(5/25 Pages) TI

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LP3963, LP3966

www.ti.com

SNVS067H – APRIL 2000 – REVISED APRIL 2013

Electrical Characteristics

LP3963/LP3966

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: VIN = VO(NOM) + 1.5V, IL = 10 mA, COUT =33µF, VSD = VIN-0.3V.

Symbol

Parameter

Conditions

Typ (1)

LP3963/6 (2)

Units

Min

Max

Output Voltage Tolerance(3)

VOUT +1.5V < VIN< 7.0V

-1.5

+1.5

10 mA < IL < 3A

-3.0

+3.0

Adjust Pin Voltage (ADJ version)

10 mA

≤ IL ≤ 3A

1.198

1.234

VADJ

1.216

VOUT +1.5V ≤ VIN≤ 7.0V

1.180

1.253

ΔV OL

Output Voltage Line Regulation

VOUT +1.5V < VIN < 7.0V

0.02

(3)

0.06

ΔVO/ ΔIOUT

Output Voltage Load Regulation

10 mA < IL < 3A

0.06

(3)

0.01

VIN - VOUT

IL = 300 mA

100

120

Dropout Voltage (4)

IL = 3A

800

1000

1200

IL = 300 mA

Ground Pin Current In Normal

IGND

Operation Mode

IL = 3A

IGND

Ground Pin Current In Shutdown

VSD ≤ 0.2V

µA

Mode (5)

IO(PK)

Peak Output Current

See (6)

4.5

3.5

SHORT CIRCUIT PROTECTION

ISC

Short Circuit Current

5.5

OVER TEMPERATURE PROTECTION

Tsh(t)

Shutdown Threshold

165

°C

Tsh(h)

Thermal Shutdown Hysteresis

°C

SHUTDOWN INPUT

Output = High

VIN

VIN–0.3

VSDT

Shutdown Threshold

Output = Low

0.2

TdOFF

Turn-off delay

IL = 3A

µs

TdON

Turn-on delay

IL = 3A

µs

ISD

SD Input Current

VSD = VIN

ERROR FLAG

Threshold

See (7)

VTH

Threshold Hysteresis

See (7)

VEF(Sat)

Error Flag Saturation

Isink = 100µA

0.02

0.1

Flag Reset Delay

µs

(1)

Typical numbers are at 25°C and represent the most likely parametric norm.

(2)

Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using

Statistical Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL).

(3)

Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage.

Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. The line

and load regulation specification contains only the typical number. However, the limits for line and load regulation are included in the

output voltage tolerance specification.

(4)

Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value.

Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the drop-out voltage is

nothing but the input to output differential, since the minimum input voltage is 2.5V.

(5)

This specification has been tested for

−40°C ≤ TJ ≤ 85°C since the temperature rise of the device is negligible under shutdown

conditions.

(6)

At elevated temperatures, devices must be derated based on package thermal resistance. The devices in TO-220 package must be

derated at

θjA = 50°C/W (with 0.5in

2, 1oz. copper area), junction-to-ambient (with no heat sink). The devices in the DDPAK/TO-263

surface-mount package must be derated at

θjA = 60°C/W (with 0.5in

2, 1oz. copper area), junction-to-ambient. See Application Hints.

(7)

Error Flag threshold and hysteresis are specified as percentage of regulated output voltage. See Application Hints.

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