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Micrel Semiconductor
Micrel Semiconductor

MIC2524 Datasheet Preview

MIC2524 Datasheet

Quad USB Power Control Switch Not Recommended for New Designs

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MIC2524 pdf
MIC2524/2527
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 Se-
rial 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 require-
ments; and a flag output is available to indicate fault condi-
tions 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 re-
mains 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.
Micrel
MIC2524/2527
Quad USB Power Control Switch
Not Recommended for New Designs
Refer to MIC2027
Features
Compliant to USB specifications
UL Recognized Component
4 independent switches
3V to 5.5V input
500mA minimum continuous load current per port
140mmaximum 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
10k
3.3V USB Controller
V+ ON/OFF
1µF OVERCURRENT
D+
DGND
Bold lines indicate
0.1" wide, 1-oz. copper
high-current traces.
* 33µF, 16V tantalum or 100µF, 10V electrolytic per port
27k MIC2524
MIC2527
ENA
IN
FLGA
IN
ENB OUTA
FLGB OUTB
ENC OUTC
FLGC OUTD
END GND
FLGD GND
33µF*
0.1
µF
33µF*
33µF*
33µF*
Ferrite
Bead
0.01µF
VBUS
D+
D
GND
0.01µF
VBUS
D+
D
GND
0.01µF
VBUS
D+
D
GND
0.01µF
VBUS
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
4-Port Self-Powered Hub
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
June 1999
1 MIC2524/2527



Micrel Semiconductor
Micrel Semiconductor

MIC2524 Datasheet Preview

MIC2524 Datasheet

Quad USB Power Control Switch Not Recommended for New Designs

No Preview Available !

MIC2524 pdf
MIC2524/2527
Ordering Information
Part Number
MIC2524-1BWM
MIC2524-1BN
MIC2524-2BWM
MIC2524-2BN
MIC2527-1BWM
MIC2527-1BN
MIC2527-2BWM
MIC2527-2BN
On-Resistance
100mtyp.
100mtyp.
100mtyp.
100mtyp.
200mtyp.
200mtyp.
200mtyp.
200mtyp.
Enable
Active High
Active High
Active Low
Active Low
Active High
Active High
Active Low
Active Low
Temperature Range
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
40°C to +85°C
Package
16-Pin SOIC
16-pin DIP
16-Pin SOIC
16-pin DIP
16-Pin SOIC
16-pin DIP
16-Pin SOIC
16-pin DIP
Micrel
Pin Configuration
FLGA 1
ENA 2
OUTA 3
GND 4
IN(C/D) 5
OUTC 6
ENC 7
FLGC 8
16 FLGB
15 ENB
14 OUTB
13 IN(A/B)
12 GND
11 OUTD
10 END
9 FLGD
16-Pin SOIC (WM)
16-Pin DIP (N)
ENA 2
FLGA 1
ENB 15
FLGB 16
LOGIC,
CHARGE
PUMP
LOGIC,
CHARGE
PUMP
ENC 7
FLGC 8
END 10
FLGD 9
LOGIC,
CHARGE
PUMP
LOGIC,
CHARGE
PUMP
3 OUTA
13 IN(A/B)
14 OUTB
6 OUTC
5 IN(C/D)
11 OUTD
4 GND 12
Functional Pinout
Pin Description
Pin Number
1
2
3
4, 12
5
6
7
8
9
10
11
13
14
15
16
MIC2524/2527
Pin Name
FLGA
ENA
OUTA
GND
IN(C/D)
OUTC
ENC
FLGC
FLGD
END
OUTD
IN(A/B)
OUTB
ENB
FLGB
Pin Function
Flag A: (Output): Channel A open-drain fault flag output.
Enable A (Input): Channel A control input.
Output A: Channel A switch output.
Ground: Supply return. Connect both pins to ground.
Supply Input: Channel C and D switch, logic, and charge-pump supply input.
Output C: Channel C switch output.
Enable C (Input): Channel C control input.
Flag C (Output): Channel C open-drain fault flag output.
Flag D (Output): Channel D open-drain fault flag output.
Enable D (Input): Channel D control input.
Output D: Channel D switch output.
Supply Input: Channel A and B switch, logic, and charge-pump supply input.
Output B: Channel B switch output.
Enable B (Input): Channel B control input.
Flag B (Output): Channel B open-drain fault flag output.
2 June 1999


Part Number MIC2524
Description Quad USB Power Control Switch Not Recommended for New Designs
Maker Micrel Semiconductor
Total Page 12 Pages
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