L9396 datasheet(20/109 Pages) STMICROELECTRONICS

20 / 109 page

Power supply

L9396

20/109

DS12539 Rev 10

All electrical characteristics are valid for the following conditions unless otherwise noted:

-40 °C ≤ Tj ≤ +175 °C; 4.5 V ≤ VBATP ≤ 19 V

Table 6. Boost regulator electrical characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VBSTNOV

Normal Operating

Voltage at VBST

Design Info With

boost, VBST is more

than minimum boost

output (> 6 V); Without

boost, VBST is

shorted to VBATP

VBSTUV_UP

VBST under voltage

release threshold

VBST rising. VBST

under-voltage release

leads to charge pump

switch on

6.5

7.1

VBSTUV_DN

VBST under voltage

detection threshold

VBST falling. VBST

under-voltage

detection leads to

charge pump shut

down.

5.6

tflt_VBST_UV

Under voltage filter

time

µs

VBST

Boost Output Voltage

Across all line and

load (steady state)

8.55

9.6

IO_BST

Boost Output

Current

Excluding current on

analog and digital 3.3V

300

dVSR_ac

Line Transient

Response

All line, load;

dt = 100 µs

-8%

dVLR_ac

Load Transient

Response

All line, load;

dt = 100 µs

-8%

LBST

Output Inductance

2.2 µH nominal

tolerance ±30%

Design Information

1.6

2.8

µH

RLBST

Output Inductance

Impedance

Design Information

0.1

CBST

Output Bulk

Capacitance

Design Information

1.76

µF

RBST

Bulk Capacitor ESR

Design Information

0.1

CBSTF

Output Filter

Capacitance

Min 100 nF nominal

Design Information

IOC

Over Current

Detection

1.2

RDSon

Switch RDSon

0.8

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