RT9705B datasheet(6/12 Pages) RICHTEK

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RT9705B

DS9705B-03 April 2011

www.richtek.com

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply and Leakage Currents

IS1

D1 = High, D0 = Low (VIN1 Active),

VIN1 = 3.6V, VIN2= 3.3V, IOUT = 0A

200

Quiescent Current From

(VIN1 + VIN2) (Operating)

IS2

D0 = D1 = Low (VIN2 Active),

VIN1 = 3.3V, VIN2= 3.6V, IOUT = 0A

200

μA

Shut Down Current From

(VIN1 + VIN2) (Standby)

ISHDN

D0 = D1 = High (Inactive),

VIN1 = VIN2 = 3.6V, IOUT = 0A

0.5

μA

Forward Leakage Current From

VIN1 (Measured from VOUT to GND)

IFLKG_VIN1

D0 = D1 = High (inactive),

VIN1 = 3.6V,

VIN2 Open, VOUT = 0V (Shorted)

0.1

μA

Forward Leakage Current From

VIN2 (Measured from VOUT to GND)

IFLKG_VIN2

D0 = D1 = High (inactive),

VIN2 = 3.6V,

VIN1 Open, VOUT = 0V (Shorted)

0.1

μA

Reverse Leakage Current to VINx

(Measured from VINx to GND)

IRLKG_VINx

D0 = D1 = High (inactive), VINX = 0V,

VOUT = 3.6V

0.3

μA

Current Limit circuit

ILIM_400

RILIM = 400Ω, VIN1 = VIN2 = 3.6V

0.95 1.25 1.56

Current Limit Accuracy

ILIM_700

RILIM = 700Ω, VIN1 = VIN2 = 3.6V

0.47 0.71 0.99

Output Current at ILIM

ILIM

VILIM = 0V, IOUT = 0A

150

μA

UVLO

VUVLO_FAL Falling Edge

1.2

1.28

VIN1 and VIN2 UVLO

VUVLO_RSE Rising Edge

1.34

1.6

VUVLO_FAL Falling Edge

2.2

2.4

Internal VDD UVLO (the higher of

VIN1 and VIN2)

VUVLO_RSE Rising Edge

2.5

2.8

UVLO Deglitch for VIN1 and VIN2

Rising Edge (Note 6) (Note7)

100

μs

VIN2 to VIN1 Comparators

Hysteresis of VIN2 to VIN1

comparator

0.1

0.25

Deglitch of VIN2 to VIN1

comparator (both Rising & Falling)

(Note 6)

μs

Reverse Conduction Blocking

ΔVO (I_Block) Minimum Output-to-

Input Voltage Difference to Block

Switching

D0 = D1 = High, VINX = 3.3V. Connect VOUT to

a 5V supply through a series 100

Ω resistor.

Let D0 = Low. Slowly decrease the supply

voltage until VOUT connects to VIN1.

130

STAT Output

Leakage Current

ILEAKAGE

VO(STAT) = 5.5V

0.01

μA

Saturation Voltage

VSAT

II(STAT) = 2mA, VIN1 Switch is On

0.4

Deglitch Time (falling edge only)

(Note 6)

150

μs

Thermal Shutdown

Thermal Shutdown Protection

TSD

135

°C

Thermal Shutdown Hysteresis

ΔTSD

°C

To be continued

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