Richtek RT9715AGB, RT9715AGF, RT9715AGQW, RT9715BGB, RT9715BGBG Schematic [ru]

...
0 (0)

RT9715

90mΩ, 2A/1.5A/1.1A/0.7A High-Side Power Switches with Flag

General Description

Features

The RT9715 is a cost-effective, low-voltage, single N-MOSFET high-side Power Switch IC for USB application. Low switch-on resistance (typ. 90mΩ) and low supply current (typ. 50uA) are realized in this IC.

The RT9715 integrates an over-current protection circuit, a short fold back circuit, a thermal shutdown circuit and an under-voltage lockout circuit for overall protection. Besides, a flag output is available to indicate fault conditions to the local USB controller. Furthermore, the chip also integrates an embedded delay function to prevent miss-operation from happening due to inrush-current. The RT9715 is an ideal solution for USB power supply and can support flexible applications since it is available in various packages such as SOT-23-5, SOP-8, MSOP-8 and WDFN-8L 3x3.

Ordering Information

RT9715

Package Type

B : SOT-23-5

BG : SOT-23-5 (G-Type)

BR : SOT-23-5 (R-Type) S : SOP-8

F : MSOP-8

QW : WDFN-8L 3x3 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Output Current/EN Function A : 2A/Active High

B : 2A/Active Low C : 1.5A/Active High D : 1.5A/Active Low E : 1.1A/Active High F : 1.1A/Active Low G : 0.7A/Active High

H : 0.7A/Active Low

Note :

Richtek products are :

`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

z90mΩ (typ.) N-MOSFET Switch

zOperating Range : 2.7V to 5.5V

zReverse Blocking Current

zUnder Voltage Lockout

zDeglitched Fault Report (FLG)

zThermal Protection with Foldback

zOver Current Protection

zShort Circuit Protection

zUL ApprovedE219878

zNemko ApprovedNO49621

zRoHS Compliant and Halogen Free

Applications

zUSB Peripherals

zNotebook PCs

Pin Configurations

(TOP VIEW)

VIN

 

EN/EN

 

VIN

EN/EN

 

 

 

 

 

 

 

 

 

5

 

4

 

 

5

4

 

 

 

 

 

 

 

 

 

 

2

3

 

 

2

3

 

 

 

 

 

 

 

 

VOUT GND FLG

VOUT GND NC

 

 

 

 

 

 

 

 

SOT-23-5

 

SOT-23-5 (G-Type)

 

VOUT

 

VIN

 

 

 

 

 

 

5

 

4

 

GND

 

8

VOUT

 

 

 

 

 

VIN

2

7

VOUT

 

 

2

3

 

VIN

3

6

VOUT

FLG GND EN/EN

EN/EN

4

5

FLG

 

 

 

 

SOT-23-5 (R-Type)

 

SOP-8/MSOP-8

 

 

 

 

 

GND

1

 

8

VOUT

 

 

 

 

VIN

2

GND

7

VOUT

 

 

 

 

VIN

3

6

VOUT

 

 

 

 

9

 

 

 

 

EN/EN

4

5

FLG

 

 

 

 

 

 

 

 

 

WDFN-8L 3x3

Marking Information

For marking information, contact our sales representative directly or through a Richtek distributor located in your area.

DS9715-03 April 2011

www.richtek.com

1

RT9715

Typical Application Circuit

Pull-Up Resistor (10K to 100K)

Supply Voltage

VIN

FLG

2.7V to 5.5V

 

 

CIN

RT9715

 

1uF

 

 

RT9715A/C/E/G

VOUT

Chip Enable

EN/EN

COUT

 

GND

 

10uF

RT9715B/D/F/H

 

 

Chip Enable

 

 

USB Controller

Over -Current

+ 150uF

VBUS

D+

D- GND

Ferrite

 

Beads

Data

 

Note : A low-ESR 150uF aluminum electrolytic or tantalum between VOUT and GND is strongly recommended to meet the 330mV maximum droop requirement in the hub VBUS. (see Application Information Section for further details)

Functional Pin Description

 

 

Pin No.

 

 

 

 

 

 

 

 

SOT-23-5

SOT-23-5

SOT-23-5

SOP-8 /

WDFN-8L

 

Pin Name

Pin Function

 

(G-Type)

(R-Type)

MSOP-8

3X3

 

 

 

 

 

 

1

1

5

6 , 7 , 8

6 , 7 , 8

 

VOUT

Output Voltage.

2

2

2

1

1

GND

Ground.

3

--

1

5

5

 

 

 

 

 

Fault FLAG Output.

FLG

4

4

3

4

4

 

 

 

Chip Enable (Active High/Low).

EN/EN

5

5

4

2 , 3

2 , 3

 

VIN

Power Input Voltage.

--

3

--

--

--

 

NC

No Internal Connection.

 

 

 

 

9 (Exposed

 

 

 

 

 

The exposed pad must be soldered to a large

--

--

--

--

 

 

 

 

 

PCB and connected to GND for maximum

Pad)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

power dissipation.

 

 

 

 

 

 

 

 

 

 

Function Block Diagram

 

 

 

 

 

 

 

 

VIN

 

 

EN/EN

Bias

UVLO

Current

 

 

 

 

 

 

Limiting

 

 

 

 

Oscillator

Charge

Gate

 

 

 

 

Control

 

 

 

 

Pump

 

 

 

 

 

 

 

 

 

 

 

 

Output Voltage

VOUT

 

 

 

 

 

Detection

 

 

 

 

 

 

 

 

 

 

Thermal

 

 

 

 

 

 

Protection

Auto Discharge

 

 

 

 

 

 

 

FLG

 

 

 

 

 

Delay

 

 

 

 

 

 

 

GND

 

 

www.richtek.com

 

 

 

DS9715-03

April

2011

2

 

RT9715

Absolute Maximum Ratings (Note 1)

 

z Supply Input Voltage, VIN --------------------------------------------------------------------------------------------

6V

z EN Voltage --------------------------------------------------------------------------------------------------------------

−0.3V to 6V

z FLAG Voltage ----------------------------------------------------------------------------------------------------------

6V

z Power Dissipation, PD @ TA = 25°C

 

SOT-23-5 ----------------------------------------------------------------------------------------------------------------

300mW

SOP-8 --------------------------------------------------------------------------------------------------------------------

469mW

MSOP-8 -----------------------------------------------------------------------------------------------------------------

469mW

WDFN-8L 3x3 ----------------------------------------------------------------------------------------------------------

694mW

z Package Thermal Resistance (Note 2)

 

SOT-23-5, θJA -----------------------------------------------------------------------------------------------------------

250°C/W

SOP-8, θJA --------------------------------------------------------------------------------------------------------------

160°C/W

MSOP-8, θJA ------------------------------------------------------------------------------------------------------------

160°C/W

WDFN-8L 3x3, θJA -----------------------------------------------------------------------------------------------------

108°C/W

z Junction Temperature -------------------------------------------------------------------------------------------------

150°C

z Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------------------

260°C

z Storage Temperature Range ----------------------------------------------------------------------------------------

−65°C to 150°C

z ESD Susceptibility (Note 3)

 

HBM (Human Body Mode) ------------------------------------------------------------------------------------------

2kV

MM (Machine Mode) --------------------------------------------------------------------------------------------------

200V

Recommended Operating Conditions

(Note 4)

z Supply Input Voltage, VIN --------------------------------------------------------------------------------------------

2.7V to 5.5V

z EN Voltage --------------------------------------------------------------------------------------------------------------

0V to 5.5V

z Junction Temperature Range ----------------------------------------------------------------------------------------

−40°C to 100°C

z Ambient Temperature Range ----------------------------------------------------------------------------------------

−40°C to 85°C

Electrical Characteristics

(VIN = 5V, CIN = 1uF, COUT = 10uF, TA = 25°C, unless otherwise specified)

 

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Quiescent Current

IQ

Switch On, VOUT = Open

--

50

70

uA

Input Shutdown Current

ISHDN

Switch Off, VOUT = Open

--

0.1

1

 

 

 

RT9715A/B

 

VIN = 5V, IOUT = 1.5A

--

90

110

 

Switch On

 

RT9715C/D

RDS(ON)

VIN = 5V, IOUT =1.3A

--

90

110

Resistance

 

RT9715E/F

VIN = 5V, IOUT = 1A

--

90

110

 

 

 

 

 

RT9715G/H

 

VIN = 5V, IOUT = 0.6A

--

90

110

 

 

 

RT9715A/B

 

 

2

2.5

3.2

 

Current

 

RT9715C/D

ILIM

VOUT = 4V

1.5

2

2.8

A

Limit

 

RT9715E/F

1.1

1.5

2.1

 

 

 

 

 

 

RT9715G/H

 

 

0.7

1

1.4

 

 

 

RT9715A/B

 

 

--

1.7

--

 

Short

 

RT9715C/D

ISC_FB

VOUT = 0V, Measured Prior to

--

1.4

--

A

Current

 

RT9715E/F

Thermal Shutdown

--

1

--

 

 

 

 

 

RT9715G/H

 

 

--

0.7

--

 

 

To be continued

 

 

DS9715-03 April 2011

www.richtek.com

3

RT9715

 

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

EN/EN

 

Logic_High Voltage

VIH

VIN = 2.7V to 5.5V

2

--

--

V

Threshold

 

Logic_Low Voltage

VIL

VIN = 2.7V to 5.5V

--

--

0.8

V

EN/EN Input Current

IEN/EN

VEN = 5V

--

0.01

0.1

uA

Output Leakage Current

ILEAKAGE

VEN = 0V, RLOAD = 0Ω

--

0.5

1

uA

Output Turn-On Rise Time

TON_RISE

10% to 90% of VOUT Rising

--

200

--

us

FLG Output Resistance

RFLG

ISINK = 1mA

--

20

--

Ω

FLG Off Current

IFLG_OFF

VFLG = 5V

--

0.01

1

uA

FLG Delay Time

TD

From fault condition to FLG

5

12

20

ms

assertion

 

 

 

 

 

 

 

 

Shutdown Auto-Discharge

RDischarge

VEN = 0V, VEN = 5V

--

100

150

Ω

Resistance

 

 

 

 

 

 

 

Under-Voltage Lockout

VUVLO

VIN Rising

1.3

1.7

--

V

Under-Voltage Hysteresis

VUVLO

VIN Decreasing

--

0.1

--

V

Thermal Shutdown Protection

TSD

VOUT > 1V

--

120

--

°C

VOUT = 0V

--

100

--

°C

 

 

 

 

Thermal Shutdown Hysteresis

 

VOUT = 0V

--

20

--

°C

Note 1. Stresses beyond those listed under Absolute Maximum Ratingsmay cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Note 2. θJA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of JEDEC 51-3 thermal measurement standard.

Note 3. Devices are ESD sensitive. Handling precaution is recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.

www.richtek.com

DS9715-03 April 2011

4

Richtek RT9715AGB, RT9715AGF, RT9715AGQW, RT9715BGB, RT9715BGBG Schematic

RT9715

Typical Operating Characteristics

On Resistance (mΩ)

108

 

 

 

On Resistance vs. Input Voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IOUT = 2A

 

 

 

 

 

 

 

 

 

 

 

 

106

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

104

 

 

 

 

 

 

SOP-8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

102

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

98

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

96

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SOT-23-5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

94

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

92

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

 

Input Voltage (V)

On Resistance vs. Temperature

 

125

VIN = 5V, IOUT = 2A

 

 

 

 

 

 

120

 

 

 

 

 

 

 

 

 

Ω)

115

 

 

 

 

 

 

 

 

 

110

 

 

 

 

 

 

 

 

 

(m

105

 

 

 

 

 

 

 

 

 

Resistance

 

 

 

SOP-8

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

95

 

 

 

 

 

SOT-23-5

 

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

85

 

 

 

 

 

 

 

 

 

On

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75

 

 

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

 

-40

-25

-10

5

20

35

50

65

80

Temperature (°C)

Quiescent Current vs. Input Voltage

Quiescent Current vs. Temperature

 

60

No Load

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

58

 

 

 

 

 

 

 

VIN = 5V,No Load

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

59

 

 

 

 

 

 

 

 

 

 

(uA)

56

 

 

 

 

 

 

 

 

(uA)

58

 

 

 

 

 

 

 

 

 

 

54

 

 

 

 

 

 

 

 

57

 

 

 

 

 

 

 

 

 

 

Current

52

 

 

 

 

 

 

 

 

Current

56

 

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

55

 

 

 

 

 

 

 

 

 

 

Quiescent

48

 

 

 

 

 

 

 

 

Quiescent

54

 

 

 

 

 

 

 

 

 

 

46

 

 

 

 

 

 

 

 

53

 

 

 

 

 

 

 

 

 

 

44

 

 

 

 

 

 

 

 

52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

 

 

 

 

 

 

 

 

 

51

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

 

-40

-25

-10

5

20

35

50

65

80

95

110

Input Voltage (V)

Temperature (°C)

Shutdown Current (uA)

Shutdown Current vs. Input Voltage

1.0

No Load

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

Input Voltage (V)

Shutdown Current (uA)

Shutdown Current vs. Temperature

1.0

VIN = 5V

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

-40 -25 -10 5 20 35 50 65 80 95 110

Temperature (°C)

DS9715-03 April 2011

www.richtek.com

5

Loading...
+ 11 hidden pages