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LTC3552

3552f

VPROG (V)

100

200

300

400

600

0.2

0.4

0.6

0.8

3552 G03

1.2

500

VIN = 5V

RPROG = 2k

RITERM = 2k

TEMPERATURE (

°C)

–50

0.9975

1.0000

1.0025

3552 G02

0.9950

0.9925

0.9900

–25

1.0050

1.0075

1.0100

100

VIN = 5V

VBAT = 4V

RPROG = 10k

VIN (V)

0.985

0.990

0.995

1.000

1.005

1.015

4.5

5.5

3552 G01

6.5

7.5

1.010

VBAT = 4V

RPROG = 10k

PROG Pin Voltage vs VIN

(Constant-Current Mode)

PROG Pin Voltage

vs Temperature

Charge Current

vs PROG Pin Voltage

TYPICAL PERFOR A CE CHARACTERISTICS T

A = 25°C Unless Otherwise Speciﬁed.

Battery Charger

TEMPERATURE (

°C)

–50

4.185

4.190

4.195

4.200

4.205

4.215

–25

025

3552 G05

100

4.210

VIN = 5V

RPROG = 10k

IBAT (mA)

4.24

300

3552 G04

4.18

4.14

100

200

400

4.12

4.10

4.26

4.22

4.20

4.16

500

600

700

VIN = 5V

RPROG = 1.25k

VIN (V)

4.185

4.190

4.195

4.200

4.205

4.215

3552 G06

4.210

4.5

5.5

6.5

7.5

RPROG = 10k

Regulated Output (Float) Voltage

vs Charge Current

Regulated Output (Float) Voltage

vs Temperature

Regulated Output (Float)

Voltage vs VIN

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime. Pins of regulators should not exceed 6V.

Note 2: The LTC3552E is guaranteed to meet performance speciﬁcations

from 0°C to 85°C Speciﬁcations over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: Failure to solder the exposed backside of the package to the PC

board will result in a thermal resistance much higher than 40°C/W. See

Thermal Considerations.

Note 4: Supply current includes PROG pin current and ITERM pin current

(approximately 100µA each) but does not include any current delivered to

the battery through the BAT pin (approximately 100mA).

Note 5: The regulator is tested in a proprietary test mode that connects

VFB to the output of the error ampliﬁer.

Note 6: Dynamic supply current is higher due to the internal gate charge

being delivered at the switching frequency.

Note 7: The regulator power switch on-resistances are guaranteed by

correlation to wafer level measurements.

Note 8: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula:

TJ = TA + (PD • θJA)

ELECTRICAL CHARACTERISTICS

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