IMP2524/27 - Daily Silver Imp

IMP252 4/2 7
POWER MANAGEMENT
ADVANCE PRODUCT INFORMATION
Quad USB High-Side Power
Switch with Fault Detection
Key Features
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.
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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.
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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 0.75µA when disabled and
just 110µA when enabled
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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.
Typical Application
Applications
◆ USB host and self-powered hubs
◆ USB video monitors
◆ USB printers
Ferrite Bead
IMP2527
5.1V ± 3%
5V ± 1%
or
IMP2524
5V ± 3%
4.7mF
USB Rev. 1.1 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
10k
+
IN OUT
LDO
GND
V+
ON/OFF
OVERCURRENT
USB Controller
VBUS
27k
1
2
3
4
5
Data
D+
D–
6
GND
1mF
7
8
IMP2524
IMP2527
ENA
INA/B
FLGA INC/D
ENB
OUTA
FLGB OUTB
ENC OUTC
FLGC OUTD
END
GND
FLGD
GND
33mF*
+
16
D+
0.01mF
GND
15
14
13
12
11
D–
0.1mF
33mF*
Downstream
USB
Port 1
500mA max.
VBUS
+
D+
0.01mF
10
D–
GND
Downstream
USB
Port 2
500mA max.
9
VBUS
33mF*
+
Bold/Blue lines indicate 0.1" wide, 1-oz. copper high-current traces.
D+
0.01mF
D–
GND
Downstream
USB
Port 3
500mA max.
*33mF, 16V tantalum or 100mF, 10V electrolytic per port
VBUS
33mF*
+
D+
0.01mF
D–
GND
Downstream
USB
Port 4
500mA max.
2524/27_01.eps
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IMP252 4/2 7
Pin Configuration
SO/DIP
ENA
FLGA
1
16 FLGB
FLGA
ENA
2
15 ENB
FLGB
OUTA
3
GND
4
IMP2524/27
14 OUTB
ENB
2
16
15
5
12 GND
6
11 OUTD
ENC
7
10 END
FLGC
FLGC
8
9
FLGD
ENC
FLGD
2524/27_02.eps
END
7
FLGA
2
ENA
3
4
OUTA
GN D
5
INC/D
6
OUTC
7
ENC
8
FLGC
9
FLGD
10
END
11
12
OUTD
GND
13
INA/B
14
OUTB
15
ENB
16
FLG B
14
6
Logic,
Charge
Pump
8
9
10
Pin Descriptions
1
13
Logic,
Charge
Pump
IMP2524/27
INC/D
Name
Logic,
Charge
Pump
13 INA/B
OUTC
Pin Number
3
1
5
Logic,
Charge
Pump
11
4
12
GND
GND
OUTA
INA/B
OUTB
OUTC
INC/D
OUTD
2524/27_03.eps
Function
Fault Flag A output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions.
Enable A Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH
(-1 suffix) and active-LOW (-2 suffix) logic devices are available.
Channel-A switch output (MOSFET Source). The output pin drives the load into ON and OFF states.
Ground. Power supply return for the internal circuitry of the IC. Connect both pins 4 and 6 together.
Channel C and D positive power supply input voltage. This is the switching MOSFET drain connection.
It is the channel C and channel D supply voltage input for the logic and the charge-pump circuit.
Channel-C switch output (MOSFET Source). The output pin drives the load into ON and OFF states.
Enable C Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH
(-1 suffix) and active-LOW (-2 suffix) logic devices are available.
Fault Flag C output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions.
Fault Flag D output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions.
Enable D Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH
(-1 suffix) and active-LOW (-2 suffix) logic devices are available.
Channel-D switch output (MOSFET Source). The output pin drives the load into ON and OFF states.
Ground. Power supply return for the internal circuitry of the IC. Connect both pins 4 and 6 together.
Channel A and B positive power supply input voltage. This is the switching MOSFET drain connection.
It is the channel A and channel B supply voltage input for the logic and the charge-pump circuit.
Channel-B switch output (MOSFET Source). The output pin drives the load into ON and OFF states.
Enable B Input. This pin is the Channel-B MOSFET switch driver control logic input. Both active-HIGH
(-1 suffix) and active-LOW (-2 suffix) logic devices are available.
Fault Flag B output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions.
2524/27t01
Ordering Information
Pin Number
Enable Logic
Typical “ON” Resistance
IMP2524-1BWM
IMP2524-2BWM
IMP2524-1BN
IMP2524-2BN
IMP2527-1BWM
IMP2527-2BWM
IMP2527-1BN
IMP2527-2BN
Active HIGH
Active LOW
Active HIGH
Active LOW
Active HIGH
Active LOW
Active HIGH
Active LOW
100mΩ
100mΩ
100mΩ
100mΩ
200mΩ
200mΩ
200mΩ
200mΩ
Temperature Range
–40°
–40°
–40°
–40°
–40°
–40°
–40°
–40°
C to +85°
C to +85°
C to +85°
C to +85°
C to +85°
C to +85°
C to +85°
C to +85°
C
C
C
C
C
C
C
C
Pins-Package
16-SO
16-SO
16-DIP
16-DIP
16-SO
16-SO
16-DIP
16-DIP
2524/27t02
2
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IMP252 4/2 7
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V
Fault Flag Voltage . . . . . . . . . . . . . . . . . . . . . . +8.0V
Fault Flag Current . . . . . . . . . . . . . . . . . . . . . . 50mA
Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Enable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 12V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 5 sec.) . . . . . . . 260°C
Package Thermal Resistance
SO (θJA ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160°C/W
DIP(θJA ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130°C/W
Note: All voltages are referenced to GND.
These are stress ratings only and functional operation is not
implied. Exposure to absolute maximum ratings for prolonged
time periods may affect device reliability.
Electrical Characteristics
Unless otherwise noted, VIN = 5V and TA = 25°C.
Parameter
Symbol Conditions
Supply Voltage Range
VIN
Operating Temperature Range
TA
Min
TA = – 40°C to +85°C
Typ
Max
Units
2.7
5.5
V
– 40
85
°C
Supply Current
Switch OFF
IIN OFF
Switch OFF, No load
VENOFF ≤ 0.8V, VENON ≥ 2.4V IMP2524/27-1
VENON ≤ 0.8V, VENOFF ≥ 2.4V IMP2524/27-2
0.75
10
µA
Supply Current
Switch ON
IIN ON
Switch ON, No load
VENOFF ≤ 0.8V, VENON ≥ 2.4V IMP2524/27-1
VENON ≤ 0.8V, VENOFF ≥ 2.4V IMP2524/27-2
110
320
µA
Enable Input Threshold
VENH
LOW to HIGH (“0” to “1”) Enable Voltage, Note 1
2.1
2.4
V
VENL
HIGH to LOW (“1” to “0”) Enable Voltage, Note 1
µA
Enable Input Current
IEN
Enable Input Capacitance
CEN
Switch ON Resistance
RON
Continuous Load Current
IL
0.8
1.9
VEN = 2.4V
0.01
1
VEN = 0.8V
0.01
1
1
pF
IMP2524: IOUT = 500mA each switch
0.10
0.14
IMP2527: IOUT = 500mA each switch
0.20
0.30
Each output
0.5
Ω
A
Output Turn-On Delay
TDON
RL = 10Ω each output
0.25
ms
Output Turn-On Rise Time
TRON
RL = 10Ω each output
1
ms
Output Turn-Off Delay
TDOFF
RL = 10Ω each output
1
20
µs
Output Turn-Off Fall Time
TFOFF
RL = 10Ω each output
1
20
µs
Output Leakage Current
IOFF
10
µA
Short-circuit Current Limit
ISC
0.75
1.25
A
0.50
Overtemperature Shutdown
TJ increasing
135
Threshold
TJ decreasing
125
Error Flag Output Resistance
RFLAG
VIN = 5V, IL = 10mA
10
VIN = 3.3V, IL = 10mA
15
Error Flag Output Current
IFLAG
VFLAG = 5V
0.01
UVLO Threshold
VUVLO
VIN Increasing
2.5
VIN Decreasing
2.3
°C
Ω
1
µA
V
Notes 1. Switch OFF is VEN ≤ 0.8V and Switch ON is VEN ≥ 2.4V for the IMP2524/27-1. Switch OFF is VEN ≥ 2.4V and Switch ON is
VEN ≤ 0.8V for the IMP2524/27-2. The Enable input has approximately 200mV of hysteresis.
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IMP252 4/2 7
Package Dimensions
Plastic DIP (16-Pin)
Millimeters
Inches
Min
D1
Max
Min
Max
Plastic DIP (16-Pin)*
N
A
A1
A2
B
B1
C
D
D1
E
E1
e
eA
eB
L
E1 E
D
A2 A
A1 L
e
0°–15°
B1
C
eA
eB
B
Plastic DIP (16-Pin).eps
SO (16-Pin)
E
H
0°– 8°
A
C
L
B
A1
0.200
———
0.175
0.022
0.065
0.012
0.765
0.080
0.325
0.310
———
———
0.400
0.150
———
0.38
3.18
0.41
1.14
0.20
18.92
0.13
7.62
6.10
2.54
7.62
———
2.92
5.08
———
4.45
0.56
1.65
0.30
19.43
2.03
8.26
7.87
———
———
10.16
3.81
SO (16-Pin)**
D
e
———
0.015
0.125
0.016
0.045
0.008
0.745
0.005
0.300
0.240
0.100
0.300
———
0.115
SO (16-Pin).eps
0.1043
0.926
A
A1
0.0040
0.0118
B
0.013
0.020
0.0125
0.0091
C
0.4133
0.3977
D
E
0.2914
0.2662
e
0.050 BSC
0.419
0.394
H
0.050
0.016
L
* JEDEC Drawing MO-058AB
** JEDEC Drawing MS-013AA
2.65
2.35
0.10
0.30
0.33
0.51
0.32
0.23
10.50
10.10
7.40
7.60
1.27 BSC
10.65
10.00
1.27
0.40
2524/26_t03.at3
Daily Silver IMP Microelectronics Co.,Ltd
7 keda Road , Hi-Tech Park,
NingBo,Zhejiang, P.R.C.
Post Code : 315040
Tel:(086)-574-87906358
Fax:(086)-574-87908866
e-mail:[email protected]
Website:www.ds-imp.com.cn
The IMP logo is a registered trademark of Daily Silver IMP.
All other company and product names are trademarks of their respective owners.
2005 Daily Silver IMP
Revision : A
Issue Date: 08/08/05
Type: Product