LTC3576-1_15 datasheet(7/48 Pages) LINER

Part #	LTC3576-1

Description	Switching Power Manager with USB On-the-Go Triple Step-Down DC/DCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3576/LTC3576-1

7

3576fb

TYPICAL PERFORMANCE CHARACTERISTICS

Ideal Diode V-I Characteristics

Ideal Diode Resistance

vs Battery Voltage

VOUT Voltage vs Load Current

(Battery Charger Disabled)

USB Limited Load Current vs Battery

Voltage (Battery Charger Disabled)

Battery and VBUS Currents

vs Load Current

Battery Charge Current

vs Temperature

PowerPath Switching Regulator

Transient Response

PowerPath Switching Regulator

Efﬁciency vs Load Current

Battery Charging Efﬁciency

vs Battery Voltage with No

External Load (PBAT/PVBUS)

FORWARD VOLTAGE (V)

0

0.6

0.8

1.0

0.16

3576 G01

0.4

0.2

0

0.04

0.08

0.12

0.20

INTERNAL IDEAL DIODE

WITH SUPPLEMENTAL

EXTERNAL VISHAY

Si2333 PMOS

INTERNAL IDEAL

DIODE ONLY

VBUS = 5V

BATTERY VOLTAGE (V)

2.7

0.15

0.20

0.25

3.9

3576 G02

0.10

0.05

0

3.0

3.3

3.6

4.2

INTERNAL IDEAL DIODE

WITH SUPPLEMENTAL

EXTERNAL VISHAY

Si2333 PMOS

INTERNAL IDEAL

DIODE

TEMPERATURE (°C)

–40

0

100

200

300

400

040

80

120

3576 G06

500

600

–20

20

60

100

THERMAL REGULATION

RPROG = 2k

LOAD CURRENT (A)

0

4.00

4.25

4.50

0.8

3576 G03

3.75

3.50

3.25

0.1 0.2 0.3 0.4 0.5 0.6 0.7

0.9 1.0

BAT = 4V

BAT = 3.4V

BATTERY VOLTAGE (V)

2.7

0

100

300

400

500

3.3

3.9

4.2

900

3576 G04

200

3.0

3.6

600

700

800

VBUS = 5V

5 MODE

LOAD CURRENT (mA)

0

250

500

750

800

3576 G05

0

–250

–500

100 200 300 400 500 600 700

900 1000

VBUS CURRENT

BATTERY CURRENT

(CHARGING)

VBUS = 5V

BAT = 3.8V

5 MODE

RCLPROG = 3.01k

RPROG = 1k

BATTERY CURRENT

(DISCHARGING)

VOUT

50mV/DIV

AC COUPLED

IVOUT

500mA/DIV

0mA

20μs/DIV

3576 G07

VBUS = 5V

VOUT = 3.65V

CHARGER OFF

10 MODE

LOAD CURRENT (mA)

30

60

50

40

100

90

80

70

3576 G08

10

1000

100

1 MODE

5 , 10 MODE

BATTERY VOLTAGE (V)

2.7

50

55

65

70

75

3.3

3.9

4.2

95

3576 G09

60

3.0

3.6

80

85

90

RCLPROG = 3.01k

RPROG = 1k

1 MODE

5 MODE

TA = 25°C unless otherwise speciﬁed.

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LTC3576-1 Datasheet(PDF) 7 Page - Linear Technology

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