L5963 datasheet(17/49 Pages) STMICROELECTRONICS

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L5963

Electrical specifications

IlimSW1

Peak current limitation on sw1 -

2.5

3.5

IlimSW2

Peak current limitation on sw2 -

3.5

fsw

Free-run switching frequency

225

250

275

kHz

fsync

Switching frequency range(3)

50% duty-cycle wave on SYNC pin

250

2000

kHz

RonHS

High side MOS on

resistance(3)

VINSWx > 3.5 V; including bonding

wires

-85-

mΩ

RonLS

Low side MOS on resistance(3) Including bonding wires

105

mΩ



Efficiency(3)

Free run frequency

VOUTSW1/2 = 5 V; Iload = 2.5 A

VOUTSW1/2 = 5 V; Iload = 1 A

-90

ΔVFBSWx / Δt FB pin slope at turn-on(3)

Including bonding wires

0.95

V/ms

TSDSWx

Thermal shutdown temperature

Temperature rising

150

160

°C

HysTSDSWx

Hysteresis on thermal

shutdown temperature

°C

THRSW1OK /

VFBSW1

SW1OK threshold as

percentage of FBSW1 voltage

919497

HysSW1OK

Hysteresis on SW1OK

VmaxSW1OK SW1OK saturation voltage

I = 1 mA in SW1OK pin

0.2

TglitchSW1OK Glitch filter time for SW1-OK

μs

ISW1OKDLY

SW1OKDLY output current

μA

THRSW1OKDLY SW1OKDLY threshold

2.2

2.4

ton-min

Minimum on time(3)

High side driver

VdropHSD

Output saturation

Iload = 0.5 A

140

170

IshortHSD

Short circuit current limit

0.7

1.3

TSDHSD

Thermal shut-down

temperature

Temperature rising

150

160

°C

HysTSDHSD

Hysteresis on thermal

shutdown temperature

°C

1. Not tested at ATE.

2. Tests involving switching frequencies higher than 1 MHz are guaranteed by design.

3. Test guaranteed by application measurements.

Table 7. Electrical characteristics (continued)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

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