LC79451KB

No.A2223-7/38

5-3. Electrical Characteristics

DC Characteristics

(Case without the special mention VDD = +2.5V, VDD2 = +2.7V, VSS = 0V, Ta=+25°C)

Parameter

Symbol

Condition

min

typ

max

Unit

Note

Input leak current

IIL

VIN = 0V to VDD

-1

-

1

μA

*1

Standby current VDD

IDDS

All Circuit Stops

0

-

1

μA

*2

Standby current VDD2

IDD2S

(RESET = L)

0

-

1

μA

*2

Operating current VDD

IDD

SPI (10MHz)

-

400

480

μA

Operating current VDD2

IDD2

-

30

36

μA

*3

VOH

IOUT = -0.5mA

VDD - 0.36

VDD - 0.2

VDD

V

*4

VOL1

IOUT = +0.5mA

0

0.1

0.18

V

*4

Output voltage

VOL2

IOUT = +3mA

0

-

0.4

V

*5

<Output Driver Characteristics>

SEG output resistance VOUT2

RON1

VOUT = VOUT2 -0.5V

8

10

12

k

Ω

SEG output resistance VSS

RON2

VOUT = +0.5V

7.5

10

12.5

k

Ω

SEG output resistance VOUT3

RON3

VOUT = VOUT3 +0.5V

8

10

12

k

Ω

<Charge-pump Characteristics>

VOUT2NL1

V

*6, *7

Output voltage VOUT2

VOUT2NL2

No Load

14.25

15.00

15.75

V

*6, *8

VOUT3NL1

V

*6, *7

Output voltage VOUT3

VOUT3NL2

No Load

-15.75

-15.00

-14.25

V

*6, *8

VOUT2L1

0.90 × VOUT2

-

VOUT2

V

*6, *7

Load output voltage VOUT2

VOUT2L2

Load Current

= -100

μA

0.95 × VOUT2

-

VOUT2

V

*6, *8

VOUT3L1

VOUT3

-

0.90 × VOUT3

V

*6, *7

Load output voltage VOUT3

VOUT3L2

Load Current

= +100

μA

VOUT3

-

0.95 × VOUT3

V

*6, *8

Load voltage ratio regulation

VRATIO

0.97

1

1.03

-

*6, *9

<Oscillator Characteristics>

Oscillator frequency

Fclk

VDD = 1.6V to 3.6V

VDD2 = 1.8V to 3.6V

31.04

32.00

32.96

kHz

*10

<Discharge Characteristics>

Discharge resistance VOUT2

RDON1

VOUT2 = +15V

8

10

12

k

Ω

*11a

Discharge resistance VOUT3

RDON2

VOUT3 = -15V

8

10

12

k

Ω

*11b

Note: *1. For RESET, SCL, SDA, CS, ID1, ID2, IFSEL, SPIDRW pin.

*2. The maximum current is prescribed with the limit value of the measuring instrument.

*3. The state of the circuit as follows.

Oscillator operates, charge-pump operates, output driver stops (No load), charge-pump voltage is in a stable

state.

Charge-pump frequency 1kHz

(control register 1 : CP_F10 = 0, CP_F11 = 0, CP_F12 = 0)

Charge-pump reference voltage 2.5V

(control register 2 : VREGSEL=1)

*4. For BUSY, DAOUT pin.

*5. For SDA pin.

*6. Use external capacitors of the recommended capacitance value.

*7. Charge-pump frequency 32kHz

(control register 1 : CP_F10 = 1, CP_F11 = 1, CP_F12 = 1)

Charge-pump reference voltage 1.25V (control register 2 : VREGSEL = 0)

*8. Charge-pump frequency 32kHz

(control register 1 : CP_F10 = 1, CP_F11 = 1, CP_F12 = 1)

Charge-pump reference voltage 2.5V

(control register 2 : VREGSEL = 1)

*9. The change ratio of the charge-pump voltage by the load.

(Output voltage VOUT2/Output voltage VOUT3) / (Load output voltage VOUT2/Load output voltage

VOUT3)

*10. Charge-pump operates.

*11. Charge-pump stops.

(*11a) Between VOUT2 and VSS.

(*11b) Between VOUT3 and VSS.