IMP IMP2527-2BWM, IMP2527-2BN, IMP2527-1BN, IMP2524-2BWM, IMP2524-2BN Datasheet
...
©
1999 IMP, Inc. 408-432-9100/www.impweb.com 1
Key Features
Applications
◆ USB host and self-powered hubs
◆ USB video monitors
◆ USB printers
◆
USB Rev. 1.1 and 2.0 Compliant
◆
Four independent switches
◆
2.7V to 5.5V input operation
◆
Low MOSFET ON resistance
– IMP2524: 0.1Ω, 0.14Ω maximum
– IMP2527: 0.2Ω, 0.3Ω maximum
◆
500mA continuos load current per switch
◆
Low supply current
– 110µA ON-state current, 0.75µA OFF-state
current
◆
1.25A maximum current limit, 750mA typical
◆
Thermal shutdown 2.4V undervoltage lockout
(UVLO)
◆
Open-drain flag output
– Undervoltage
– Current limit
– Thermal shutdown
◆
Output can be force higher than input
◆
Active HIGH(-1) and active LOW(-2) enable
◆
16-pin SO and DIP packages, Die available
◆
Pin compatible with the Micrel MIC2524 and
MIC2527
Typical Application
IMP252
IMP252
4/2
4/277
ADVANCE PRODUCT INFORMATIONPOWER MANAGEMENT
Quad USB High-Side P
Quad USB High-Side Poowwerer
Switc
Switc
h wit
h wit
h F
h F
ault Det
ault Det
ection
ection
The IMP2524 and IMP2527 are complete power management solutions
for bus-powered and self-powered USB hubs. Each device contains four
independent power switches and fault detection logic. The IMP2524
channel resistance is a low 140mΩ maximum and the IMP2527 channel
resistance is 300Ω maximum. Both device operate with voltage inputs
from 2.7V to 5.5V
The IMP2524/2527 conform to the new USB 1.1 standard. Fault current
is limited to 750mA typically, and a flag output for each switch conveys
fault information to the local USB controller. The IMP252x “Soft-Start”
function ramps the ON-current to eliminate any excessive voltage drop
on the input side that could occur when capacitive loads are charged.
Self-monitoring features include thermal shutdown to prevent
catastrophic switch failure from high-current loads and undervoltage
lockout (UVLO) that insures that the device remains OFF unless there is
sufficient supply voltage present.
The switch Enable input logic can interface with both 3.3V and 5V logic.
Both active-HIGH (-1 devices) and active-LOW (-2 devices) enable logic
versions are available. Supply current is a low 0.75µAwhen disabled and
just 110µA when enabled
The quad IMP2524/7 devices are available in 16-pin DIP and 16-pin
SO packages and are pin compatible replacements for the Micrel
MIC2524-1/-2 and MIC2527-1/2 devices. IMP offers a complete family
of USB power management products. For single-switch applications see
the IMP2525 and IMP2525A data sheets. The single-switch IMP2525A
features a 0.07Ω switch resistance. For dual-switch applications, refer to
the IMP2526 data sheet.
Data
Ferrite Bead
2
1
3
4
5
6
7
8
INA/B
INC/D
OUTA
OUTB
OUTC
OUTD
GND
GND
16
15
14
13
12
11
10
9
ENA
FLGA
ENB
FLGB
ENC
FLGC
END
FLGD
IMP2524
IMP2527
USB Controller
V
+
D+
D–
ON/OFF
OVERCURRENT
LDO
OUTIN
GND
GND
27k
1mF
0.01mF
0.1mF
10k
2524/27_01.eps
33mF*
GND
D–
D+
Downstream
USB
Port 1
500mA max.
V
BUS
+
IMP2527
5.1V ± 3%
5V ± 1%
or
IMP2524
5V ± 3%
0.01mF
33mF*
GND
D–
D+
Downstream
USB
Port 2
500mA max.
V
BUS
+
4.7mF
+
0.01mF
33mF*
GND
D–
D+
Downstream
USB
Port 3
500mA max.
V
BUS
+
0.01mF
33mF*
GND
D–
D+
Downstream
USB
Port 4
500mA max.
V
BUS
+
Bold/Blue lines indicate 0.1" wide, 1-oz. copper high-current traces.
*33mF, 16V tantalum or 100mF, 10V electrolytic per port
2
408-432-9100/www.impweb.com
©
1999 IMP, Inc.
Pin Descriptions
Ordering Information
Pin Configuration
IMP252
IMP252
4/2
4/277
4GND
3OUTA
2ENA
1FLGA
13 INA/B
14 OUTB
15 ENB
16 FLGB
8FLGC
7ENC
6OUTC
5INC/D
9 FLGD
10 END
11 OUTD
12 GND
2524/27_02.eps
IMP2524/27
SO/DIP
2524/27_03.eps
OUTA
3
INA/B
GND
13
4
GND
12
FLGA
2
ENA
1
Logic,
Charge
Pump
OUTB
14
ENB
15
FLGB
16
Logic,
Charge
Pump
OUTC
6
INC/D
5
FLGC
8
ENC
7
Logic,
Charge
Pump
OUTD
11
END
10
FLGD
9
Logic,
Charge
Pump
IMP2524/27
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10t72/4252
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MWB1-4252PMIHGIHevitcAm001 Ω C°58+otC°04– OS-61
MWB2-4252PMIWOLevitcAm001 Ω C°58+otC°04– OS-61
NB1-4252PMIHGIHevitcAm001 Ω C°58+otC°04– PID-61
NB2-4252PMIWOLevitcAm001 Ω C°58+otC°04– PID-61
MWB1-7252PMIHGIHevitcAm002 Ω C°58+otC°04– OS-61
MWB2-7252PMIWOLevitcAm002 Ω C°58+otC°04– OS-61
NB1-7252PMIHGIHevitcAm002 Ω C°58+otC°04– PID-61
NB2-7252PMIWOLevitcAm002 Ω C°58+otC°04– PID-61
20t72/4252
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