Item

Pin

Symbol

Parameter

Test condition

Min.

Typ . Max.

Unit

A.022

VS

VUVLO_fall

Undervoltage lockout, falling

VO = 5 V

V

4.6

4.8

4.9

A.023

VS

VUVLO_ rise

Undervoltage lockout, rising

VO = 0.8 V; 1.2 V; 1.5 V;

1.8 V

1.7

1.8

2.1

V

VO=2.5 V; 2.8 V; 3.3 V

2.6

2.7

2.8

VO=5 V

4.9

5.1

5.3

1. Ishort typical value of 120 mA for t= 400 µs during the power on

2. Vs_Low = 3.5 V@VO = 0.8 V, 1.2 V,1.5 V,1.8 V& 2.5 V; Vs_Low=5 V@ VO= 2.8 V & 3.3 V, Vs_Low= 6 V@VO = 5 V

3. Parameters are guaranteed by design

4. Referred to Figure 26. Maximum load variation response

5. Considering that the minimum operating input voltage is 2.15 V, the dropout voltage (Vdp) is not defined for output voltages

below 1.8 V.

Table 6. Fast output discharge

Item

Pin

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

A.024

VO

RFD

Fast discharge - pull

down resistor

VS= 3.95 V; 13.5 V; VO =

3.3 V, VO = 5 V

EN = low

50

75

120

Ω

Table 7. Reset

Item

Pin

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

A.025

RST

Vrst_l

Reset output low voltage

VS = 5 V; 13.5 V

Rext ≥ 4.7 KΩ to VO

VO = 3.3 V, VO = 5 V

0.2 x

VO

V

A.026

RST

Irst_lkg

Reset output high

leakage current

Vrst = 0.8 V

1

µA

A.027

RST

VO_th

VO out of regulation – low

threshold

VS = 5 V; 13.5 V

VO decreasing

VO=3.3 V,

VO=5 V

13.5%

10%

6.5%

Below

VO

A.055

RST

VO_th_hyst

VO out of regulation – low

threshold hysteresis

VS = 5 V; 13.5 V; VO

increasing; VO=3.3 V ;

VO=5 V

2%

VO_th

A.028

RST

Trr

Reset reaction time

VS = 5 V; 13.5 V; VO=3.3

V ; VO=5 V

10

16

37

µs

A.029

RST

Trd

Reset delay time

VS = 5 V; 13.5 V ; VO=3.3

V ; VO = 5 V

160(1)

250

300

µs

1. Trd = 120 µs for Vs < 3.5V.

Table 8. Enable

Item

Pin

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

A.042

EN

VEn_low

EN input low voltage

0.6

V

A.043

EN

VEn_high EN input high voltage

1.5

V

A.045

EN

IEn

Pull down current

VS = 13.5 V

4

12

µA

L99VR01

Electrical specifications

DS13649 - Rev 4

page 8/40