SP2526A-2EN-L/TR_技术文档

®

Advanced

Dual USB High-Side Power Switch

SP2526A

FEATURES

1

2

3

4

8

7

6

5

ENA

FLGA

FLGB

ENB

OUTA

IN

■ +3.0V to +5.5V Input Voltage Range

■ Two Independent Power Switches

■ Two Error Flag Outputs, Open Drain

■ 2.6V Undervoltage Lockout

SP2526A

8 Pin NSIOC

GND

OUTB

■ 1.25A Short Circuit Current Limit

■ 150mΩ Maximum On-Resistance

■ 110µA On-State Supply Current

■ 1µA Shutdown Current

Now Available in Lead Free Packaging

■ Active-High Version: SP2526A-1

■ Active-Low Version: SP2526A-2

■ Output Can Be Forced Higher Than

Input (Off-State)

■ Thermal Shutdown

APPLICATIONS

■ USB Power Management

■ Hot Plug-In Power Supplies

■ Battery Charger Circuit

DESCRIPTION

■ 1ms Soft-Start Power Up, Fast Turn Off

The SP2526A device is a dual +3.0V to +5.5V USB Supervisory Power Control Switch ideal

for self-powered and bus-powered Universal Serial Bus (USB) applications. Each switch has

low on-resistance (110mΩ typical) and can supply 500mA minimum. The fault currents are

limited to 1.0A typical and the flag output pin for each switch is available to indicate fault

conditions to the USB controller. The thermal shutdown feature will prevent damage to the

device when subjected to excessive current loads. The undervoltage lockout feature will

ensure that the device will remain off unless there is a valid input voltage present.

TYPICAL APPLICATION CIRCUIT

VCC

5.0V

+33µF

+

10K

4.50V TO 5.25V

UPSTREAM VBUS

SP2526A

USB CONTROLLER

ON/OFF

100mA MAX

SPX1521

OUT

OUTA

IN

VBUS

D+

ENA

IN

VBUS

D+

D-

VIN

Ferrite Bead

OVERCURRENT

FLGA

+

0.1µF

D-

33µF

+ 1µF

Cin

+

0.01 µF

10µF

Cout

GND

FLGB

ENB

*

GND

Ferrite Bead

DATA

OUTB

ON

GND

DATA

VBUS

D+

Ferrite Bead

33µF, 16V Tantalum, or

100µF, 10V Electrolytic

+

*

Bold line indicate high-current traces

D-

33µF

0.01 µF

*

GND

Ferrite Bead

DATA

Two Port Self Powered Hub

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

1

ABSOLUTE MAXIMUM RATINGS

Thesearestressratingsonlyandfunctionaloperationofthedeviceattheseratingsoranyotherabovethoseindicated

in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions

for extended periods of time may affect reliability.

Operating Temperature Range.............-40˚C to +85˚C

Junction Temperature Range..............................125˚C

Storage Temperature Range..............-65˚C to +150˚C

Lead Temperature (10 sec. soldering)................260˚C

Supply Voltage(V_IN)..........................................7.0V

Fault Flag Voltage (V_FLG)..................................7.0V

Fault Flag Current (I_FLG)..................................50mA

Enable Control Input (V_EN).....................-0.3V -15V

Power Dissipation Per Package

8-pin NSOIC (derate 6.14mW/^OC above +70^OC).......500mW

ELECTRICAL CHARACTERISTICS

Unless otherwise noted, the following specifications apply for V_IN= +5.0V, T_A= 25^°C.

PARAMETER

MIN. TYP. MAX. UNITS

CONDITIONS

Supply Current

0.75

110

5.0

160

V

_EN= Logic "0" OUT = Open

_EN= Logic "1" OUT = Open

µA

V

Enable Input Voltage

Enable Input Current

1.7

2.0

0.8

V_EN= Logic "0"

_EN= Logic "1"

2.4

V

0.01

1

V_EN= Logic "0"

_EN= Logic "1"

µA

V

Enable Input Capacitance

Output Mosfet Resistance

Output Turn-On Delay

1

pF

mΩ

µs

µA

A

110

100

150

R_L=10Ω each output

Output Turn-On Rise Time

Output Turn-Off Delay

1000 4000

0.8

0.7

20

Output Turn-Off Fall Time

Output Leakage Current

Current Limit Threshold

10

0.6

1.0

1.25

Over-Temperature Shutdown

Threshold

135

125

T_Jincreasing

T_Jdecreasing

^OC

Error Flag Output Resistance

10

15

25

40

V_IN= 5V,I_L= 10mA

V_IN= 3.3V,I_L= 10mA

Ω

µA

V

Error Flag Off Current

UVLO Threshold

0.01

1

V

_FLAG= 5V

2.6

2.4

V

_INincreasing

_INdecreasing

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

2

PIN DESCRIPTION

Pin Number

Pin Name

Description

1

ENA

Enable Input for MOSFET Switch A. This input pin is active high for the

SP2526A-1 and active low for the SP2526A-2

2

3

FLGA

FLGB

An active-low and open-drained fault flag output fot channel A. It can indicate

current limit when ENA is active. In normal mode operation (ENA or/and ENB

is active), it also can indicate thermal shudown or undervoltage.

An active-low and open-drained fault flag output fot channel B. It can indicate

current limit when ENB is active. In normal mode operation (ENA or/and ENB

is active), it also can indicate thermal shudown or undervoltage.

4

5

ENB

Enable Input for MOSFET Switch B. This input pin is active high for the

SP2526A-1 and active low for the SP2526A-2

OUTB

Output for MOSFET Switch Channel B. This is the output pin of the MOSFET

source of channel B, typically connected to the switched side of the load.

6

7

8

GND

IN

Ground.

Power supply input

OUTA

Output for MOSFET Switch Channel A. This is the output pin of the MOSFET

source of channel A, typically connected to the switched side of the load.

TEST CIRCUIT

10K R1

V_CC

+5V

10K R2

SP2526A

10Ω

ON

ENA

OUTA

R4

OFF

FLGA

IN

0.1µF

C1

FLGB

ENB

GND

10Ω

ON

OFF

OUTB

R4

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

3

APPLICATION INFORMATION

Supply Filtering

A 0.1µF to 1µF bypass capacitor from IN to

GND, located near the device, is strongly recom-

mended to control supply transients. Without a

bypass capacitor, an output short may cause

sufficient ringing on the input (from supply lead

inductance) to damage internal control circuitry.

Error Flag

An open-drained output of an N-channel

MOSFET, the FLG output is pulled low to

signal the following fault conditions: input

undervoltage, output current limit, and thermal

shutdown.

Current Limit

The current limit threshold is preset internally.

It protects the output MOSFET switches from

damage resulting from undesirable short circuit

conditions or excess inrush current, which is

often encountered during hot plug-in. The low

limit of the current limit threshold of the

SP2526A allows a minimum current of 0.6A

through the MOSFET switches. A current limit

condition will signal the error flag.

Transient Requirements

USB supports dynamic attachment (hot plug-in)

of peripherals. A current surge is caused by the

input capacitance of downstream device. Ferrite

beads are recommended in series with all power

and ground connector pins. Ferrite beads reduce

EMI and limit the inrush current during hot-

attachment by filtering high-frequency signals.

Thermal Shutdown

Short Circuit Transient

When the chip temperature exceeds 135ºC for

any reason other than overcurrent fault of either

one of the two MOSFETs, the thermal shut-

downfunctionturnsoffbothMOSFETswitches

and signals the error flag. A hysteresis of 10ºC

prevents the MOSFETs from turning back on

until the chip temperature drops below 125ºC.

However, if thermal shutdown is triggered by

chiptemperatureriseresultingfromovercurrent

fault condition of either one of the MOSFET

switches, the thermal shutdown function will

only turn off the switch that is in overcurrent

condition and the other switch can still remain

its normal operation. In other words, the ther-

mal shutdown function of the two switches is

independent of each other in the case of

overcurrent fault.

Bulk capacitance provides the short-term tran-

sientcurrentneededduringahot-attachmentevent.

A 33 µF,16V tantalum or a 100µF,10V electro-

lyticcapacitormountedclosetodownstreamcon-

nector each port should provide transient drop

protection

Printed Circuit Layout

ThePowercircuitryofUSBprintedcircuitboards

requires a customized layout to maximize ther-

mal dissipation and to minimize voltage drop and

EMI.

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

4

BLOCK DIAGRAM

OUTA

FLGA

ENA

Driver

Current

Limit

CS

Charge

Pump

Thermal

Shutdown

IN

UVLO

Current

Limit

Charge

Pump

CS

ENB

Driver

FLGB

OUTB

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

5

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5.0V, single MOSFET switch section, and T_AMB= +25^OC unless otherwise noted.

140

130

120

110

100

90

118

116

114

112

110

108

106

104

R

T_A

L

= 47Ω

= 25ºC

R_L

T_A

= 47Ω

= 25ºC

80

70

60

2.5

3

3.5

4

4.5

5

5.5

6

-40

-20

0

20

40

60

80

100

Supply Voltage (V)

Temperature (°C)

Figure 2. Output On-Resistance vs. Temperature

Figure 1. Output On-Resistance vs. Supply Voltage

3

160

140

120

2.8

Rising

2.6

Both Switches On

2.4

100

Falling

2.2

80

60

2

-40

-20

0

20

40

60

80

100

3

4

5

6

7

8

Temperature (°C)

Supply Voltage (V)

Figure 3. UVLO Threshold Voltage vs. Temperature

Figure 4. On-state Supply Current vs. Supply Voltage

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

6

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5.0V, single MOSFET switch section, and T_AMB= +25^OC unless otherwise noted.

130

120

110

100

90

0.10

0.08

0.06

0.04

0.02

0.00

Switches Enabled

Switches Disabled

80

-40

-20

0

20

40

60

80

100

-40

-20

0

20

40

60

80

100

Temperature (°C)

Figure 6. Off-state Supply Current vs. Temperature

Figure 5. On-state Supply Current vs. Temperature

0.10

0.08

0.06

1.7

1.6

Enable Voltage Rising

1.5

1.4

1.3

1.2

1.1

1.0

0.04

Enable Voltage Falling

Both Switches Off

0.02

0.00

-40

-20

0

20

40

60

80

100

3

3.5

4

4.5

5

5.5

Temperature (°C)

Supply Voltage (V)

Figure 8. Control Threshold vs. Supply Voltage

Figure 7. Off-state Supply Current vs. Supply Voltage

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

7

TYPICAL PERFORMANCE CHARACTERISTICS

V_IN= +5.0V, single MOSFET switch section, and T_AMB= +25^OC unless otherwise noted.

6

4

2

0

5

3

1

RL = 47Ω

1.5

-1

0.5

1.0

2.5

2.0

0

Time (mS)

Figure 9. Turn-on/Turn-off Characteristics

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

8

PACKAGE: 8 Pin NSOIC

D

Ø

e

E/2

L2

E1

E1/2

E

Ø

Seating Plane

Ø1

L

L1

Gauge Plane

VIEW C

1

b

INDEX AREA

(D/2 X E1/2)

TOP VIEW

A1

A

Seating Plane

A2

SIDE VIEW

8 Pin NSOIC JEDEC MO-012 (AA) Variation

MIN

1.35

0.1

1.25

0.31

0.17

NOM

-

MAX

1.75

0.25

1.65

0.51

0.24

SYMBOL

A

A1

A2

b

B

SEE VIEW C

c

D

E

E1

e

L

4.90 BSC

6.00 BSC

3.90 BSC

1.27 BSC

-

0.4

1.27

b

L1

L2

ø

1.04 REF

0.25 BSC

-

0º

5º

8º

15º

ø1

-

c

Note: Dimensions in (mm)

BASE METAL

SECTION B-B

WITH PLATING

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

9

ORDERING INFORMATION

Part Number

Temperature Range

Package Types

SP2526A-1EN ................................................. -40°C to +85°C ................................................... 8-pin NSOIC

SP2526A-1EN/TR ........................................... -40°C to +85°C .................................................. 8-pin NSOIC

SP2526A-2EN ................................................. -40°C to +85°C ................................................... 8-pin NSOIC

SP2526A-2EN/TR ........................................... -40°C to +85°C .................................................. 8-pin NSOIC

Available in lead free packaging. To order add “-L” suffix to part number.

Example: SP2526A-1EN/TR = standard; SP2526A-1EN-L/TR = lead free

/TR = Tape and Reel

Pack quantity is 2,500 for NSOIC.

CLICK HERE TO ORDER SAMPLES

Corporation

ANALOG EXCELLENCE

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the

application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

Date: 12/06/04

SP2526A Dual USB High-Side Power Switch

10


型号：	SP2526A-2EN-L/TR
厂家：	SIPEX CORPORATION
描述：	Power Supply Support Circuit, Fixed, 2 Channel, PDSO8, GREEN, MS-012AA, NSOIC-8 光电二极管
文件：	总10页 (文件大小：88K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SP2526A-2EN-L/TR [SIPEX]

相关型号：

SP2526A-2EN/TR

SP2526AS32RG

SP2526EB

SP2526EN-1

SP2526EN-2

SP2526EP-1

SP2526EP-2

SP2526XS23RG

SP2526XS35RG

SP2555NUTG

SP25F

SP25UF