L5956

Electrical specifications

9/16

Figure 3.

Typical application circuit

182022

V

200

500

mV

IGNITION BUFFER (push-pull with Schmidt trigger)

1.03

1.17

1.28

V

1.18

1.27

1.33

V

Hysteresis of ignition buffer

50

mV

1000

1500

2000

µA

Low level sink current

10

15

20

mA

Low level

0.3

0.5

V

High level

4.5

Vreg2

5.5

V

Rising time

C = 15pF

10

µs

Fall time

C = 15pF

10

µs

Input clamp current

2

mA

Input voltage

Operative

0

50

V

ENABLE INPUT (regulators 1,3,4 and power switch)

Voltage threshold

1.3

1.8

2.3

V

Input voltage

Operative

0

5

V

1.

Drop condition means that the supply voltage drop down to 100 mV from the regulated output and the regulator is sourcing

its maximal load current °

Table 4.

Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

POWER

SWITCH

REG1

REG2

REG3

REG4

VIN1

EN SW

BU

VIN2

EN 4

HOLD

REG 4

REG 3

REG 2

REG 1

SW

Vs

EN 1

470 µF

100 nF

Cfilt (*)

Cfilt (*)

Cfilt (*)

22 µF

IGNITION

BUFFER

THERMAL

PROTECTION

RESET

BUFFER

DUMP LOAD

PROTECTION

CRES

10 K

1 nF

47 nF

RES

to µProcessor

to µProcessor

IGNITION

BUFFER

THERMAL

PROTECTION

RESET

BUFFER

DUMP LOAD

PROTECTION

AC00427

CRES

10 K

Ω

1 nF

47 nF

RES

to µProcessor

to µProcessor

470 µF

Cfilt (*)

10 K

Ω

(*) Recommended output filtering capacitors: C range = 5 µF to 100 µF, ESR range= 0.5

Ω to 10 Ω (T= -40 ˚C to +85 ˚C)