E-L5970D

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

Electrical data L5970D

4/16

2 Electrical data

2.1 Maximum ratings

2.2 Thermal data

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

V

8

Input voltage 40 V

V

1

Output DC voltage

Output peak voltage at t = 0.1µs

-1 to 40

-5 to 40

V

V

I

1

Maximum output current int. limit.

V

4

, V

5

Analog pins 4 V

V

3

INH -0.3V to V

CC

V

2

SYNC -0.3 to 4 V

P

TOT

Power dissipation at T

A

≤ 60°C 0.75 W

T

J

Operating junction temperature range -40 to 150 °C

T

STG

Storage temperature range -55 to 150 °C

Table 3. Thermal data

Symbol Parameter SO8 Unit

R

thJA

Maximum thermal resistance junction-ambient

120

(1)

1. Package mounted on board

°C/W

L5970D Electrical characteristics

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3 Electrical characteristics

Table 4. Electrical characteristics

( T

J

= 25°C, V

CC

= 12V, unless otherwise specified)

Symbol Parameter Test condition Min Typ Max Unit

V

CC

Operating input

voltage range

V

o

= 1.235V; I

o

= 2A

(1)

4.4 36 V

R

DS(on)

Mosfet on

Resistance

(1)

0.250 0.5 Ω

I

l

Maximum limiting

current

V

CC

= 4.4V to 36V

1.5 1.87 2.25 A

f

s

Switching frequency

(1)

212 250 280 KHz

225 250 275 KHz

Duty cycle 0 100 %

Dynamic characteristics (see test circuit ).

V

5

Voltage feedback

4.4V < V

CC

< 36V,

20mA < I

O

< 2A

1.220 1.235 1.25 V

(1)

1.198 1.235 1.272 V

h Efficiency

V

O

= 5V, V

CC

= 12V

90 %

DC characteristics

I

qop

Total operating

quiescent current

(1)

35mA

I

q

Quiescent current

Duty cycle = 0;

V

FB

= 1.5V

2.5 mA

I

qst-by

Total stand-by

quiescent current

V

inh

> 2.2V

(1)

50 100 µA

V

CC

= 36V;

V

inh

> 2.2V

(1)

80 150 µA

Inhibit

INH threshold

voltage

Device ON 0.8 V

Device OFF 2.2 V

Error amplfier

V

OH

High level output

voltage

V

FB

= 1V

3.5 V

V

OL

Low level output

voltage

V

FB

= 1.5V

0.4 V

I

o source

Source output

current

V

COMP

= 1.9V;

V

FB

= 1V

200 300 µA

Electrical characteristics L5970D

6/16

I

o sink

Sink output current

V

COMP

= 1.9V;

V

FB

= 1.5V

11.5 mA

I

b

Source bias current 2.5 4 µA

DC open loop gain

R

L

= ∞ 50 65 dB

gm Transconductance

I

comp

= -0.1mA to

0.1mA

V

COMP

= 1.9V

2.3 mS

Sync function

High input voltage

V

CC

= 4.4V to 36V 2.5 V

REF

V

Low input voltage

V

CC

= 4.4V to 36V 0.74 V

Slave sink current

V

sync

= 0.74V

(2)

V

sync

= 2.33V

0.11

0.21

0.25

0.45

mA

mA

Master output

amplitude

I

source

= 3mA

2.75 3 V

Output pulse width

no load,

V

sync

= 1.65V

0.20 0.35 µs

Reference section

Reference voltage 3.234 3.3 3.366 V

I

REF

= 0 to 5mA

V

CC

= 4.4V to 36V

(1)

3.2 3.3 3.399 V

Line regulation

I

REF

= 0mA

V

CC

= 4.4V to 36V

510mV

Load regulation

I

REF

= 0 to 5mA 8 15 mV

Short circuit current 10 18 30 mA

1. Specification Referred to T

J

from -40 to 125°C. Specification over the -40 to +125 T

J

Temperature range

are assured by design, characterization and statistical correlation.

2. Guaranteed by design.

Table 4. Electrical characteristics

(continued)

( T

J

= 25°C, V

CC

= 12V, unless otherwise specified)

Symbol Parameter Test condition Min Typ Max Unit

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

E-L5970D

Mfr. #:

Manufacturer:

STMicroelectronics

Description:

IC REG BUCK ADJUSTABLE 1A 8SO

Lifecycle:

New from this manufacturer.

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