Analog Integrated Circuit Device Data

Freescale Semiconductor

5

34845

ELECTRICAL CHARACTERISTICS

STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS

STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS

Table 3. Static and Dynamic Electrical Characteristics

85

conditions, unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

SUPPLY

Supply Voltage

5.0

10

21

V

Supply Current when in Shutdown Mode

EN = Low, PWM = Low

-

2.0

10

μA

Supply Current when Operational Mode

Boost = Pulse Skipping, Channels = 1% of Duty Cycle

EN = High, PWM = Low

-

5.0

6.5

mA

Under-voltage Lockout

UVLO

4.0

-

4.4

V

Under-voltage Hysteresis

-

0.25

-

V

VDC1 Voltage(6)

2.4

2.5

2.6

V

5.7

6.0

6.3

V

BOOST

Output Voltage Range(7)

VIN = 5.0 V

VIN = 21 V

8.0

24

-

-

43

60

V

Boost Switch Current Limit

34845, 34845A

34845B

1.9

2.1

2.1

2.35

2.3

2.6

A

Boost Switch Current Limit Timeout

-

10

-

ms

RDSON of Internal FET

-

300

520

m

Ω

Boost Switch Off state Leakage Current

-

-

1.0

μA

Feedback pin Off-state Leakage Current

-

-

500

μA

Peak Boost Efficiency(8)

-

90

-

%

Notes

6.

This output is for internal use only and not to be used for other purposes

7.

Minimum and maximum output voltages are dependent on Min/Max duty cycle condition.

8.

external components are used: L = 10