LM5021

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SNVS359D – MAY 2005 – REVISED MARCH 2013

Absolute Maximum Ratings

(1) (2)

VIN to GND

-0.3V to 30V

VIN Clamp Continuous Current

5mA

CS to GND

-0.3V to 1.25V

RT to GND

-0.3V to 5.5V

All other pins to GND

-0.3V to 7.0V

Human Body Model

2kV

Storage Temperature

-65°C to +150°C

Operating Junction Temperature

+150°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3)

The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor into each pin.

Operating Ratings

(1)

8V to 30V

Junction Temperature

-40°C to +125°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.

(2)

After initial turn-on at VIN = 20V.

Electrical Characteristics

(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

STARTUP CIRCUIT

Start Up Current

Before VCC Enable

18

25

µA

VCC Regulator enable threshold

17

20

23

V

VCC Regulator disable threshold

7.25

V

VIN ESD Clamp voltage

I = 5mA

30

36

40

V

Operating supply current

COMP = 0VDC

2.5

3.75

mA

VCC SUPPLY

Controller enable threshold

6.5

7

7.5

V

Controller disable threshold

5.3

5.8

6.3

V

VCC regulated output

No External Load

8

8.5

9

V

VCC dropout voltage (VIN - VCC)

I = 5 mA

1.7

V

VCC regulator current limit

15

22

mA

SKIP CYCLE MODE COMPARATOR

Skip Cycle mode enable threshold

⅓ [COMP - 1.25V]

75

125

175

mV

Skip Cycle mode hysteresis

5

mV

CURRENT LIMIT

CS limit to OUT delay

CS stepped from 0 to

35

ns

0.6V, time to OUT

0.

CS limit threshold

0.45

0.5

0.55

V

Leading Edge Blanking time

90

ns

CS blanking sinking impedance

35

55

Ω

(1)

Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation

using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).

(2)

Device thermal limitations may limit usable range.

Copyright © 2005–2013, Texas Instruments Incorporated

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