MICREL MIC2524-1BN, MIC2524-1BWM, MIC2524-2BN, MIC2524-2BWM, MIC2527-2BWM Datasheet

MIC2524/2527 Micrel

MIC2524/2527

Quad USB Power Control Switch

Not Recommended for New Designs

Refer to MIC2027

General Description

The MIC2524 and MIC2527 are cost-effective high-side
power switches with four independently controlled channels,
optimized for self-powered and bus-powered Universal Se­rial Bus (USB) applications. Few external components are
necessary to satisfy USB requirements.

The MIC2524/7 satisfies the following USB requirements:
each switch channel supplies up to 500mA as required by
USB downstream devices; the switch’s low on-resistance
meets USB voltage drop requirements; fault current is limited
to typically 750mA, well below the UL 25VA safety require­ments; and a flag output is available to indicate fault condi­tions to the local USB controller. Soft start eliminates the
momentary voltage drop on the upstream port that may occur
when the switch is enabled in bus-powered applications.

Additional features include thermal shutdown to prevent
catastrophic switch failure from high-current loads,
undervoltage lockout (UVLO) to ensure that the device re­mains off unless there is a valid input voltage present, and

3.3V and 5V logic compatible enable inputs.
The MIC2524/7 is available in active-high and active-low

versions in 16-pin DIP and SOIC packages.

Features

• Compliant to USB specifications

• UL Recognized Component

• 4 independent switches

• 3V to 5.5V input

• 500mA minimum continuous load current per port

• 140mΩ maximum on-resistance (MIC2524)

• 1.25A maximum short circuit current limit

• Individual open-drain fault flag pins

• 220µA on-state supply current

• 1µA typical off-state supply current

• Output can be forced higher than input (off-state)

• Thermal shutdown

• 2.4V typical undervoltage lockout (UVLO)

• 1ms turn-on (soft-start) and fast turnoff

• Active-high or active-low enable versions

• 16-pin SOIC and DIP packages

Applications

• USB bus-powered hubs

• USB self-powered hubs

• USB monitors

• USB printers

Typical Application

MIC2527

5.1V ± 3%
5V ± 1%

or

MIC2524

5V ±3%

MIC5207-3.3

LDO Regulator

IN OUT

4.7
µF

GND

Bold lines indicate

0.1" wide, 1-oz. copper
high-current traces.

* 33µF, 16V tantalum or 100µF, 10V electrolytic per port

3.3V USB Controller

V+

1µF

OVERCURRENT

D+
D–

10k

GND

ON/OFF

27k

MIC2524
MIC2527

ENA
FLGA IN
ENB OUTA
FLGB

OUTB

ENC

OUTC

OUTDFLGC
END
FLGD GND

GND

Ferrite

Bead

V

BUS

33µF*

IN

0.1
µF

33µF*

33µF*

33µF*

0.01µF

0.01µF

0.01µF

0.01µF

D+

D–

GND

V

BUS

D+

D–

GND

V

BUS

D+

D–

GND

V

BUS

D+

D–

GND

Downstream

USB

Port 1

500mA max.

Downstream

USB

Port 2

500mA max.

Downstream

USB

Port 3

500mA max.

Downstream

USB

Port 4

500mA max.

UL Recognized Component

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

June 1999 1 MIC2524/2527

4-Port Self-Powered Hub

MIC2524/2527 Micrel

Ordering Information

Part Number On-Resistance Enable Temperature Range Package

MIC2524-1BWM 100mΩ typ. Active High –40°C to +85°C 16-Pin SOIC
MIC2524-1BN 100mΩ typ. Active High –40°C to +85°C 16-pin DIP
MIC2524-2BWM 100mΩ typ. Active Low –40°C to +85°C 16-Pin SOIC
MIC2524-2BN 100mΩ typ. Active Low –40°C to +85°C 16-pin DIP
MIC2527-1BWM 200mΩ typ. Active High –40°C to +85°C 16-Pin SOIC
MIC2527-1BN 200mΩ typ. Active High –40°C to +85°C 16-pin DIP
MIC2527-2BWM 200mΩ typ. Active Low –40°C to +85°C 16-Pin SOIC
MIC2527-2BN 200mΩ typ. Active Low –40°C to +85°C 16-pin DIP

Pin Configuration

FLGA

ENA

OUTA

GND

IN(C/D)

OUTC

ENC

FLGC

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

FLGB
ENB
OUTB
IN(A/B)
GND
OUTD
END
FLGD

16-Pin SOIC (WM)

16-Pin DIP (N)

Pin Description

Pin Number Pin Name Pin Function

1 FLGA Flag A: (Output): Channel A open-drain fault flag output.
2 ENA Enable A (Input): Channel A control input.
3 OUTA Output A: Channel A switch output.

4, 12 GND Ground: Supply return. Connect both pins to ground.

5 IN(C/D) Supply Input: Channel C and D switch, logic, and charge-pump supply input.
6 OUTC Output C: Channel C switch output.
7 ENC Enable C (Input): Channel C control input.
8 FLGC Flag C (Output): Channel C open-drain fault flag output.

9 FLGD Flag D (Output): Channel D open-drain fault flag output.
10 END Enable D (Input): Channel D control input.
11 OUTD Output D: Channel D switch output.
13 IN(A/B) Supply Input: Channel A and B switch, logic, and charge-pump supply input.
14 OUTB Output B: Channel B switch output.
15 ENB Enable B (Input): Channel B control input.
16 FLGB Flag B (Output): Channel B open-drain fault flag output.

ENA 2

FLGA 1
ENB 15

FLGB 16

ENC 7

FLGC 8
END 10

FLGD 9

Functional Pinout

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

3 OUTA

13 IN(A/B)

14 OUTB

6 OUTC

5 IN(C/D)

11 OUTD

124 GND

MIC2524/2527 2 June 1999

MIC2524/2527 Micrel

Absolute Maximum Ratings (Note 1)

Supply Voltage (V
Fault Flag Voltage (V
Fault Flag Current (I
Output Voltage (V
Output Current (I
Control Input (V

) .....................................................+6V

IN

)..............................................+6V

FLG

) ............................................50mA

FLG

) ..................................................+6V

OUT

)...............................Internally Limited

OUT

)......................................... –0.3V to 12V

EN

Operating Ratings (Note 2)

Supply Voltage (V
Ambient Operating Temperature (T
Thermal Resistance

SOIC (θ

).........................................................120°C/W

JA

DIP(θJA).............................................................130°C/W

) ...................................... +3V to +5.5V

IN

) ........ –40°C to +85°C

A

Storage Temperature (TS) ....................... –65°C to +150°C

Lead Temperature (Soldering 5 sec.) ....................... 260°C

ESD Rating, Note 3 ......................................................2kV

Electrical Characteristics

VIN = +5V; TA = 25°C; unless noted.

Parameter Condition Min Typ Max Units
Supply Current Note 4, switch off, OUT = open 1.5 10 µA

Note 4, all switches on, OUT = open 220 320 µA

Enable Input Threshold low-to-high transition 2.1 2.4 V

high-to-low transition, Note 4 0.8 1.9 V
Enable Input Current VEN = 0V to 5.5V –1 ±0.01 1 µA
Enable Input Capacitance 1pF
Switch Resistance MIC2524, I

MIC2527, I
Output Turn-On Delay RL = 10Ω each output 0.5 ms
Output Turn-On Rise Time RL = 10Ω each output 1 ms
Output Turnoff Delay RL = 10Ω each output 1 20 µs
Output Turnoff Fall Time RL = 10Ω each output 1 20 µs
Output Leakage Current each output (output disabled) 10 µA
Continuous Load Current each output 0.5 A
Short-Circuit Current Limit each output (enable into load), V
Current-Limit Threshold ramped load applied to enabled output, V
Overtemperature Shutdown TJ increasing 135 °C

Threshold
Error Flag Output Resistance VIN = 5V, IL = 10mA 10 Ω

Error Flag Off Current V
UVLO Threshold VIN = increasing 2.5 V

TJ decreasing 125 °C

VIN = 3.3V, IL = 10mA 15 Ω

= 5V 0.01 1 µA

FLAG

VIN = decreasing 2.3 V

= 500mA, each switch 100 140 mΩ

OUT

= 500mA, each switch 200 300 mΩ

OUT

= 4.0V 0.5 0.75 1.25 A

OUT

≤ 4.0V, Note 5 1.6 2.2 A

OUT

Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4. Off is ≤ 0.8V and on is ≥ 2.4V for the MIC252x-1. Off is ≥ 2.4V and on is ≤ 0.8V for the MIC252x-2. The enable input has approximately 200mV

Note 5. See “Functional Characteristics: Current-Limit Response” photo.

of hysteresis. See control threshold charts.

June 1999 3 MIC2524/2527

MIC2524/2527 Micrel

Typical Characteristics

VIN = 5V; TA = 25°C; one switch section; unless noted.

Output On-Resistance

vs. Supply Voltage

110

100

90

OUTPUT RESISTANCE (mΩ)

80

3.0 3.5 4.0 4.5 5 5.5

Awaiting Full

Characterization

Data

RL = 44Ω

T = 25°C

SUPPLY VOLTAGE (V)

On-State Supply Current

vs. Supply Voltage

500

400

300

200

100

SUPPLY CURRENT (µA)

ALL SWITCHES ON

0

02468

SUPPLY VOLTAGE (V)

Output On-Resistance

140

120

100

ON-RESISTANCE (mΩ)

vs. Temperature

80

60

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

RL = 44Ω

VIN = 5V

Off-State Supply Current

vs. Supply Voltage

2.0

1.5

1.0

0.5

SUPPLY CURRENT (µA)

0

2345678

ALL SWITCHES OFF

SUPPLY VOLTAGE (V)

UVLO Threshold Voltage

3.0

2.5

2.0

THRESHOLD VOLTAGE (V)

1.5

vs. Temperature

RISING

FALLING

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Control Threshold

vs. Supply Voltage

2.5

2.0

1.5

THRESHOLD VOLTAGE (V)

1.0
2345

V

RISING

CTL

V

FALLING

CTL

SUPPLY VOLTAGE (V)

On-State Supply Current

400
350
300
250
200
150
100

SUPPLY CURRENT (µA)

vs. Temperature

50

0

-40 -20 0 20 40 60 80 100

ALL SWITCHES ON

TEMPERATURE (°C)

Output Rise Time

vs. Temperature

5

4

3

2

TIME (µs)

1

0

-40 -20 0 20 40 60 80 100

Awaiting Full

Characterization

Data

TEMPERATURE (°C)

Off-State Supply Current

2.0

1.5

1.0

0.5

SUPPLY CURRENT (µA)

vs. Temperature

ALL SWITCHES OFF

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Output Fall Time

1.0

0.8

0.6

0.4

TIME (ms)

0.2

vs. Temperature

Awaiting Full

Characterization

Data

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Control Threshold

2.5

2.0

1.5

ENABLE VOLTAGE (V)

1.0

vs. Temperature

VEN RISING

VEN FALLING

VIN = 5V

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Current-Limit Threshold

2.0

1.8

1.6

1.4

CURRENT (A)

1.2

1.0

vs. Temperature

CURRENT LIMIT
THRESHOLD

SHORT CIRCUIT
CURRENT LIMIT

-25 0 25 50 75 100

TEMPERATURE (°C)

MIC2524/2527 4 June 1999