SC908EVB datasheet(5/30 Pages) SEMTECH

Part #	SC908EVB

Description	Power Management IC for Single-Cell Li-Ion Devices

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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SC908

5

Electrical Characteristics (continued)

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Core Functions (Excluding Charger)

Core Circuits Quiescent

Current (4)

I

Q-Core

V

VAD

= V

SEN

= 0V,

V

LEN

= V

BAT

= 4.2V

100

μA

VREF Reference Voltage

V

VREF

0.75

V

VREF Power Supply Rejection

PSRR

REF

V

BAT

= 3.7V with 0.5V

P-to-P

ripple,

f ≤ 10kHz, C

VREF

= 10nF

70

dB

VREF Reference Voltage Start-Up

Time (5, 10)

t

SU_REF

Delay from first of SEN high

LEN high, V

BAT

= 3.7V

C

VREF

= 10nF

VREF from 0V to 95% of final

0.4

ms

DC-DC Buck Converter

Buck Converter Input Voltage

V

SVIN

BAT pin is also the switching regulator

supply input

V

BAT

V

Buck Converter Under-Voltage

Lockout Rising Threshold

VT

SUVLO-R

2.8

V

Buck Converter Under-Voltage

Lockout Falling Threshold

VT

SUVLO-F

2.55

V

Buck Converter Under-Voltage

Lockout Hysteresis

VT

SUVLO-HYS

84

mV

Buck Converter Quiescent

Current (2)

I

BAT-Q

V

SEN

= V

BAT

, I

SVOUT

= 10mA

Low I

Q

mode of P

SAVE

115

μA

Buck Converter Minimum

On-Time

t

SON_MIN

60

ns

Buck Converter Maximum

Duty Cycle (10)

SDC

MAX

92

%

Buck Converter Program Output

Voltage Minimum (6,10)

V

SVOUT_MIN

1V

Buck Converter Program Output

Voltage Maximum(6,7,8,10)

V

SVOUT_MAX

V

BAT

≥ V

SVOUT_MAX

/SDC

MAX

+150mV

3

V

Buck Converter Feedback

Regulation Voltage

V

SFB

0.480

0.500

0.520

V

Buck Converter Output Voltage(6)

V

SVOUT

V

BAT

= 3.7V, L = 4.7μH

I

SVOUT

= 100mA

R

S1

= 340kΩ, R

S2

= 100kΩ

2.2

V

Buck Converter

Line Regulation(6)

V

SVOUT_LINE

2.8V ≤ V

BAT

≤ 4.5V

I

SVOUT

= 100mA

R

S1

= 340kΩ, R

S2

= 100kΩ

-0.3

0.3

%/V

Buck Converter

Load Regulation (6)

V

SVOUT_LOAD

5mA ≤ I

SVOUT

≤ 150mA

V

BAT

= 3.7V

R

S1

= 340kΩ, R

S2

= 100kΩ

0.002

%/mA

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