LTC4099 查看數據表（PDF） - Linear Technology

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LTC4099

I2C Controlled USB Power Manager/Charger with Overvoltage Protection

Linear Technology 

LTC4099

Electrical Characteristics

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.

Note 2: The LTC4099 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: The LTC4099 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

Note 4: Total input current is the sum of quiescent current, IVBUSQ, and

measured current given by:

VCLPROG / RCLPROG • (hCLPROG + 1)

Note 5: The PROG pin always represents actual charge current. See the

Full Capacity Charge Indication (C/x) section.

Typical Performance Characteristics TA = 25°C, VBUS = 5V, BAT = 3.8V, RPROG = 1.02k,

RCLPROG = 3.01k, unless otherwise noted.

Battery and VBUS Currents

vs Output Current

600

VBUS CURRENT

400

BATTERY

200

CURRENT

(CHARGING)

0

–200

BATTERY

CURRENT

(DISCHARGING)

VBUS INPUT LIMIT SET

–400 FOR USB 500mA

BATTERY CHARGER SET

FOR 800mA

–600

0

200 400 600 800

OUTPUT CURRENT (mA)

1000

4099 G01

Battery and VBUS Currents

vs Output Current

800

VBUS CURRENT

600

400

BATTERY

CURRENT

(CHARGING)

200

VBUS INPUT LIMIT SET

FOR 790mA

BATTERY CHARGER SET

FOR 500mA

0

BATTERY

CURRENT

–200

0

(DISCHARGING)

200 400 600 800 1000

OUTPUT CURRENT (mA)

4099 G02

Battery Drain Current

vs Battery Voltage

25

IVOUT = 0µA

VBUS = 0V

20

15

10

VBUS = 5V

5

(SUSPEND MODES)

0

2.7

3.0

3.3

3.6

3.9

4.2

BATTERY VOLTAGE (V)

4099 G04

PowerPath Switching Regulator

Efficiency vs Output Current

100 VCLPROG = 0V

90

100mA VBUS INPUT

LIMIT MODE

80

70

60

500mA TO 1.2A

VBUS INPUT LIMIT MODES

50

40

0.01

0.1

OUTPUT CURRENT (A)

1

4099 G05

Output Voltage vs Output Current

5.0

4.5

BAT = 4V

4.0

3.5

BAT = 3.4V

VBUS INPUT LIMIT SET

FOR USB 500mA

BATTERY CHARGER DISABLED

3.0

0

200 400 600 800

OUTPUT CURRENT (mA)

1000

4099 G03

Battery Charging Efficiency

vs Battery Voltage with No

External Load (PBAT/PVBUS)

100

500mA USB SETTING

90

100mA USB SETTING

80

70

60

50

2.7

3.0

3.3

3.6

3.9

4.2

BATTERY VOLTAGE (V)

4099 G06

4099fd



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