2

LTC4050

4050f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Supply Voltage

q

4.5

10

V

Input Supply Current

Charger On, Current Mode

q

1.3

3

mA

Shutdown Mode

q

1.3

3

mA

Sleep Mode (Battery Drain Current)

5

15

µA

Regulated Output (Float) Voltage in

LTC4050-4.1; 5V

4.059

4.1

4.141

V

Constant Voltage Mode

LTC4050-4.2; 5V

4.158

4.2

4.242

V

LTC4050-4.1; 5V

q

4.039

4.1

4.141

V

LTC4050-4.2; 5V

q

4.137

4.2

4.242

V

Current Mode Charge Current

440

500

535

mA

q

415

585

mA

60

100

140

mA

Trickle Charge Current

20

55

90

mA

Trickle Charge Threshold Voltage

q

2.41

2.49

2.58

V

q

44.5

V

130

mV

PROG Pin Manual Shutdown

3.6

V

Threshold Voltage

Automatic Shutdown Threshold Voltage

25

54

85

mV

40

69

100

mV

PROG Pin Current

2.3

µA

PROG Pin Source Current,

q

300

µA

PROG Pin Voltage

2.47

V

ACPR Pin Output Low Voltage

0.525

V

CHRG Pin Weak Pull-Down Current

32

µA

CHRG Pin Output Low Voltage

0.525

V

Thermistor Resistance for Hot Fault

3.7

4.1

4.4

k

Ω

Thermistor Resistance for Cold Fault

25

28.5

31

k

Ω

ORDER PART

NUMBER

(Note 1)

SENSE, DRV, BAT, SEL,

TIMER, PROG, CHRG, ACPR .................– 0.3V to 12V

Operating Temperature Range (Note 2) . – 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

LTC4050EMS-4.1

LTC4050EMS-4.2

Consult LTC Marketing for parts specified with wider operating temperature ranges.

MS PART MARKING

LTTW

LTTX

ELECTRICAL CHARACTERISTICS

1

2

3

4

5

BAT

NTC

CHRG

TIMER

GND

10

9

8

7

6

ACPR

SENSE

DRV

PROG

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MS PACKAGE

10-LEAD PLASTIC MSOP