STOD1412 datasheet(6/21 Pages) STMICROELECTRONICS

6 / 21 page

Electrical characteristics

STOD1412

6/21

Electrical characteristics

Table 5.

Electrical characteristics

(TJ=25°C, VI =VCC=3.7 V, CI=2.2 µF, CO1,2=4.7 µF, C3=1 µF, CREF=100 nF, L1=4.7 µH,

L2=6.8 µH, IO1,2=IO1-IO2=30 mA, VEN=VI, VO1=4.6 V, VO2=-6.4 V, R1=470 kΩ, R2=166 kΩ,

R3=533 kΩ, R4=100 kΩ, unless otherwise specified).

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Supply section

Supply input voltage

2.7

5.5

Operating input voltage

range

2.7

4.5

UVLO_H

Under voltage lockout

HIGH

VCC

2.55

UVLO_L

Under voltage lockout

LOW

2.5

I_VI

Input current

VFB1=1.3 V, VFB2= -0.5 V (no switching)

0.5

No Load

3.5

Quiescent current

VEN=GND

µA

VEN H

Enable high threshold

VI=2.7 V to 4.5 V

1.2

VEN L

Enable low threshold

VI=2.7 V to 4.5 V

0.6

IEN

Enable input current

VEN=VI

1µA

Dynamic performance

Freq.

Frequency

1.3

MHz

D1MAX

Maximum duty cycle

No load

D2MAX

Maximum duty cycle

No load

Total system efficiency

IO1,2=10 to 30 mA, VO1=4.6 V,

VO2= -6.4 V

IO1,2=30 to 120 mA, VO1=4.6 V,

VO2= -6.4 V

Step-up converter section

VFB1

Feedback voltage on

step-up (1)

VI=2.7 V to 4.5 V

1.20

ΔV

Static line regulation

VI=2.7 V to 4.2 V, IO1=5 mA, IO2 no load,

TJ= -40°C to 85°C

ΔV

Static line regulation

VI=2.7 V to 4.2 V, IO1=100 mA, IO2 no

load, TJ= -40°C to 85°C

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