L99LD02 datasheet(54/66 Pages) STMICROELECTRONICS

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Electrical specifications

L99LD02

54/66

DS12448 Rev 3

VBST_OUT_min

Minimum boost output

voltage

VS = 13.5 V

VDD = 5 V

Boost active in open loop

VBST_OUT = 80 V

SP1, SP2 pins floating

VSN1, VSN2 = 0 V

14.7

15.2

VBST_OUT_max

Maximum boost output

voltage

77.4

82.3

VBST_OUT_step Boost output voltage step

0.35

0.51

0.7

V10V,VS

Output voltage of 10V

LDO from Vs

VS = 13.5 V

CV10V = 1 µF 

Iload = 1 mA

9.7

10.3

V10V,BST_OUT

Output voltage of 10V

LDO from Bst_Out

VBST_OUT = 25 V

CV10V = 1 µF 

Iload = 1 mA

9.7

10.3

V10V_DROP

Min voltage drop of 10V

LDO respect to VS:

V10V_DROP = (VS – V10V)

VS = 10 V

I(V10V) = -1 mA

200

I10V,LIM (1)

Current capability of 10V

LDO from Vs input

VS = 13.5 V

V10V forced to GND

TROOM

0.09

1. I10V,LIM = Qtgate x Fboost_sw (external MOSFET total gate charge multiplied by boost switching frequency).

Table 35. Boost gate driver (continued)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

Table 36. Boost controller

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

FBOOST_SW_MAX

Boost maximum operative

switching frequency

VS = 13.5 V

VDD = 5 V

VSP1, VSP2 = 0.3 V

VSN1, VSN2 = 0 V

VCOMP = 0 V

470

kHz

FBOOST_SW_MIN

Boost minimum operative

switching frequency

VS = 13.5 V

VDD = 5 V

VSP1, VSP2 = 0.3 V

VSN1, VSN2 = 0 V

VCOMP = 0 V

100

kHz

FBOOST_ACC

Boost Switching Frequency

accuracy

-8

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