XRP2527IHB-1-F [EXAR]
Single/Dual Channel Adjustable Current Power Distribution Switch; 单/双通道可调电流电源分配开关
| 型号： | XRP2527IHB-1-F |
| 厂家： | 
EXAR CORPORATION |
| 描述： | Single/Dual Channel Adjustable Current Power Distribution Switch |
| 文件： | 总13页 (文件大小：3269K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
July 2011
Rev. 1.1.0
GENERAL DESCRIPTION
APPLICATIONS
The XRP2527 and XRP2528 devices are
respectively single and dual channel integrated
high-side power distribution switches with
independent enables, fault flags and precise
programmable current limit thresholds. A wide
1.8V to 5.5V input voltage range allows for
operations from industry standard 1.8V, 3.3V
and 5V power rails.
Generic Power Switching
Self Powered USB 2.0 and 3.0 Hubs
USB Compliant VBUS Power Distribution
Audio-Video Equipments
FEATURES
Current limit thresholds can be programmed
accurately and independently for each channel
via an external resistor. A simple setting
optimizes the XRP2527 and XRP2528 for use
in USB 2.0 or 3.0 compliant VBUS power
distribution architectures. These devices can
be used in any self or bus powered USB
applications. The power-switch rise and fall
times are controlled to minimize current
surges during turn on/off.
Single/Dual Channel Current Switch
1A per channel capable
1.8V to 5.5V Input Voltage Range
Programmable Over-Current Limit
300mA to 1A set via external resistor
±8% threshold accuracy at 1A
USB 2.0/3.0 Compliant
Individual Channel Enable
Built-in over current, under voltage lockout
(UVLO), reverse current and over temperature
protections insure safe operations under
abnormal operating conditions.
Individual Channel Fault Flag Indicator
Under voltage Lockout, Reverse
Current and Thermal Shutdown
Protection
XRP2527
and
XRP2528
RoHS
are
offered
respectively
in
compliant
RoHS Compliant, Green/Halogen Free
“green”/halogen free 3mm x 3mm 8-pin and
10-pin TDFN packages.
8-Pin and 10-Pin TDFN Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP2528 Application Diagram
Exar Corporation
www.exar.com
48720 Kato Road, Fremont CA 94538, USA
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
ABSOLUTE MAXIMUM RATINGS
OPERATING RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated 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.
Input Voltage Range VIN.............................1.75V to 5.5V
Junction Temperature Range....................-40°C to 125°C
Thermal Resistance θJA .................................................
TDFN-8L .................................................... 43.0°C/W
TDFN-10L .................................................. 40.5°C/W
VIN ..........................................................-0.3V to 7.0V
VEN, VFLG ............................................................... 7.0V
Storage Temperature.............................. -65°C to 150°C
Power Dissipation................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ...................300°C
ESD Rating (HBM - Human Body Model).................... 2kV
ESD Rating (MM - Machine Model) ...........................200V
ELECTRICAL SPECIFICATIONS
Specifications are for an Operating Junction Temperature of TJ = 25°C only; limits applying over the full Operating Junction
Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, VIN = 1.8V to 5.5V, CIN = 47µF//1 µF, COUT = 10µF, TJ = –40°C to 125°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
•
•
Input Supply Voltage
5.5
V
1.8
XRP2528, (Both Channels enabled)
VIN=5V, IOUT1 = IOUT2 =0mA
Input Quiescent Current
80
52
150
µA
XRP2527 and XRP2528 (1 Channel enabled)
VIN=5V, IOUT1 =0mA
•
•
•
Input Quiescent Current
Input Shutdown Current
100
3
µA
µA
A
VIN=5V, Channel(s) disabled
Maximum Output Current per
channel
XRP2527 and XRP2528. RSET=100kΩ
1
Output Leakage Current
Reverse Leakage Current
Output MOSFET Resistance
Output turn-on delay
10
10
µA
µA
mΩ
µs
µs
µs
µs
A
VIN=5V, VOUT=0V, Each channel, Switch off
VIN=0V, VOUT=5V, Each channel, Switch off
IOUT=0.3A, Each channel
•
80
1000
2000
10
140
VIN=5V, RL=10Ω, COUT=1µF, each output
VIN=5V, RL=10Ω, COUT=1µF, each output
VIN=5V, RL=10Ω, COUT=1µF, each output
VIN=5V, RL=10Ω, COUT=1µF, each output
VIN – VOUT =0.3V, RSET floating, USB 3.0
VIN – VOUT =0.3V, RSET tied to VIN, USB 2.0
Output turn-on rise time
Output turn-off delay
4000
20
Output turn-off fall time
22
50
•
•
1.15
0.85
1.4
0.90
0.68
0.3
1
Current limit threshold
1.02
1
A
Current limit threshold range
Current limit threshold accuracy
Short Circuit Current Limit
A
•
1.087
1.174
A
RSET=100kΩ for ILIM(min)=1A, VIN-VOUT=0.3V
0.66xILIM
A
VOUT =0V
Output Voltage Short Circuit
Detect Threshold
Device operates in short circuit current limit mode
when output voltage is below the threshold.
925
3
mV
A
Safe Operating Area (SOA)
Current Limit
Over temperature shutdown
threshold
135
10
°C
°C
Temperature rising
Over temperature shutdown
threshold hysteresis
Temperature decreasing
VIN rising or falling
Under-voltage lockout threshold
Under-voltage lockout hysteresis
FLG output logic low voltage
FLG output high leakage
1.68
50
1.75
V
1.55
mV
mV
µA
100
250
1
IFLG=10mA, VIN=5.5V
© 2011 Exar Corporation
2/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
Parameter
FLG blanking time
Min.
Typ.
Max.
Units
Conditions
10
ms
V
•
•
EN input logic high voltage
EN input logic low voltage
EN input leakage current
1.5
-1
0.5
1
V
0
µA
VEN=0V or VEN=5.5V
BLOCK DIAGRAM
Fig. 2: XRP2527-XRP2528 Block Diagrams
3/13
© 2011 Exar Corporation
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
PIN ASSIGNMENT
XRP2528
1
2
3
10
9
ENA
OUTA
IN
FLGA
11
GND
8
FLGB
GND
4
5
7
6
ENB
OUTB
RSETB
RSETA
TDFN-10L
3mm x 3mm
g. 3: XRP2527/28 Pin Assignment
PIN DESCRIPTION – XRP2527
Name
Pin Number
Description
1
Channel Enable Input
Error Flag Signal
EN
2
FLG
Active low open drain output. Active on over-current, over-temperature or UVLO conditions.
3
5,6
7
Ground Signal
No Connect
GND
NC
Voltage Input Pin
Voltage Output Pin
IN
8
OUT
Current Limiting Threshold setting
RSET floating: USB 3.0 current limit settings
RSET tied to IN: USB 2.0 current limit settings
RSET tied to GND via resistor R: Adjustable current limit
4
RSET
PIN DESCRIPTION – XRP2528
Name
Pin Number
Description
1,4
Channel Enable Input
Error Flag Signal
ENX
2,3
FLGX
Active low open drain output. Active on over-current, over-temperature or UVLO conditions.
8
9
Ground Signal
GND
IN
Voltage Input Pin
Voltage Output Pin
7,10
OUTX
Current Limiting Threshold setting
RSET floating: USB 3.0 current limit settings
RSET tied to IN: USB 2.0 current limit settings
RSET tied to GND via resistor R: Adjustable current limit
5,6
RSETX
ORDERING INFORMATION
Part Number
XRP2527IHB-1-F
XRP2527IHBTR-1-F
XRP2528IHB-1-F
XRP2528IHBTR-1-F
Temperature Range Marking Package Packing Quantity
Note 1
Note 2
2527I
YYWW 1
X
2528I
YYWW 1
X
Bulk
Single Channel
Active high
Lead Free and
Halogen Free
TDFN8
-40°C≤TA≤+85°C
2.5K/Tape & Reel
Bulk
Dual Channel
Active high
Lead Free and
Halogen Free
TDFN10
-40°C≤TA≤+85°C
2.5K/Tape & Reel
XRP2527 Evaluation Board
XRP2528 Evaluation Board
XRP2527EVB
XRP2528EVB
“YY” = Year – “WW” = Work Week – “X” = Lot Number
© 2011 Exar Corporation
4/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at VIN = 5V, CIN = 47µF//1µF, COUT = 10µF, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM
from Application Information section of this datasheet.
Fig. 5: Output On-Resistance vs. Temperature (XRP2528)
Fig. 4: Output On-Resistance vs. Temperature (XRP2527)
Fig. 7: Quiescent Current vs. Temperature
XRP2527 and XRP2528 (1-channel on)
Fig. 6: Off Supply Current vs. Temperature
Fig. 8: Quiescent Current vs. Temperature
XRP2528 (2-channels on)
Fig. 9: FLG Logic Low Voltage vs. Temperature
© 2011 Exar Corporation
5/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
Fig. 11: Quiescent Current vs. Input Voltage
XRP2528 (2-channels on)
Fig. 10: Quiescent Current vs. Input Voltage
XRP2527 and XRP2528 (1-channel on)
Fig. 13: Output Turn-on Delay vs. Temperature
Fig. 12: Output Turn-Off Delay vs. Temperature
Fig. 15: Output Rise Time vs. Temperature
Fig. 14: Output Fall Time vs. Temperature
© 2011 Exar Corporation
6/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
Fig. 17: Output Turn-On Delay Time vs. Input Voltage
Fig. 16: Output Turn-Off Delay Time vs. Input Voltage
Fig. 19: Output Rise Time vs. Input Voltage
Fig. 18: Output Fall Time vs. Input Voltage
Fig. 20: Current Limit Threshold vs. Temperature (XRP2527)
Fig. 21: Current Limit Threshold vs. Temperature (XRP2528)
© 2011 Exar Corporation
7/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
Current limit Threshold vs. RSET resistor
XRP2527 & XRP2528 (Both channels)
1200
1000
800
600
400
200
0
100
150
200
250
300
350
RSET (kOhm)
VIN=5V
VIN=3.3V
VIN=1.8V
Fig. 22: Under-voltage lockout trip level vs. Temperature
(VIN Rising)
Fig. 23: Current Limit Threshold vs. RSET resistor value
Fig. 24: Turn-On, Turn-Off Characteristics (XRP2528):
Fig. 25: Turn-On, Turn-Off Characteristics (XRP2528):
COUT = 1uF, Rload = 10Ω, RSET floating
COUT = 1uF, Rload = 5Ω, RSET floating
Fig. 26: Current Limit Operation (XRP2527):
Fig. 27: Current Limit Operation (XRP2528):
VIN=5.5V, Rload = 3.9Ω, USB3.0
VIN=1.8V, Rload = 1.5Ω, USB2.0
© 2011 Exar Corporation
8/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
Fig. 28: Current Limit Operation (XRP2527):
VIN=5V, Rload = 10Ω, RSET = 330kΩ
Over-temperature and under voltage lockout
conditions are flagged immediately while the
output over – current condition is reported if
continuously persistent for longer than the
blanking time of 10ms. The blanking time
prevents erroneous reporting of current faults
due to brief output current spikes.
THEORY OF OPERATION
The XRP2527 and XRP2528 devices are
respectively single and dual channel integrated
high-side power distribution switches with
programmable current limit threshold feature.
They can be used in any self or bus powered
USB applications and are compliant with the
latest USB 3.0 specifications. The reverse
current protection feature prevents current to
flow from OUT to IN when the device is
disabled.
Once activated, the error flag signal remains
low until all fault conditions have been
removed and is independent for each
individual channel.
CURRENT LIMIT
I
NPUT & OUTPUT
The current limit feature protects the output
MOSFET switches from damages resulting
from undesirable short circuit conditions or
excess inrush current, which is often
Placing bulk capacitances of at least 47μF and
10μF at the input and output pins respectively
reduces power supply transients under heavy
current load conditions.
encountered
during
hot
plug-in.
Upon
It is important to place a 1μF ceramic bypass
capacitor from IN to GND as close as possible
to the device in order to control supply
transients.
detection of overcurrent condition, the output
current is limited to a constant current limit
threshold value and the output voltage is
reduced accordingly. Triggering the current
limit function is signaled by the Error Flag
after 10ms of blanking time period.
Furthermore, bypassing the output pin with a
0.1μF to 1μF ceramic capacitor improves the
device response to short-circuit transients.
The minimum current limit threshold can be
programmed from 300mA to 1A set via an
external resistor at the RSET pin. If RSET pin
is left floating, then the device is set to USB
3.0 current limit setting. For USB 2.0 current
limit setting, the RSET pin must be tied to
VIN. The current limit threshold value is set
using the resistor at RSET pin by the following
equation:
E
RROR FLAG
The error flag signal (FLGX output pin) is an
open-drain output and is pulled low (active
low) upon detection of the following
conditions:
Over-current condition
Over-temperature condition
Under voltage lockout condition
© 2011 Exar Corporation
9/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
108.7
ꢆꢇꢈꢉꢃkohmꢄ
preventing any damages to the device while a
fault condition is reported by the error flag
signal. A built-in 10°C hysteresis allows the
device to cool down to 125°C before resuming
normal operations on the faulty channel at
which point the error flag signal is cleared.
ꢃ ꢄ
ꢀꢁꢀꢂ typ. A ꢅ
Please note that the allowed values for RSET
resistor are 100kohm < RSET < 330kohm.
U
NDER-VOLTAGE LOCKOUT
T
EST CIRCUIT
Under-voltage lockout function (UVLO) keeps
the internal power switch from being turned
on until the power supply has reached at least
1.68V, even if the switch is enabled. Upon
detection
of
an
input
voltage
below
approximately 1.68V, the power switch is
turned off while a fault condition is reported by
the error flag signal.
T
HERMAL PROTECTION
Internal thermal sensing circuitry monitors the
operating temperature of the device for each
channel independently. Upon detection of a
temperature in excess of 135°C, the power
switch for the given channel is disabled
© 2011 Exar Corporation
10/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
PACKAGE SPECIFICATION
8-PIN TDFN
© 2011 Exar Corporation
11/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
10-PIN TDFN
© 2011 Exar Corporation
12/13
Rev. 1.1.0
XRP2527 - XRP2528
Single/Dual Channel Adjustable Current Power
Distribution Switch
REVISION HISTORY
Revision
Date
Description
05/13/2011
07/14/2011
Initial release of datasheet
Corrections of typographical errors
1.0.0
1.1.0
FOR FURTHER ASSISTANCE
Email:
customersupport@exar.com
Exar Technical Documentation:
http://www.exar.com/TechDoc/default.aspx?
E
XAR
CORPORATION
H
EADQUARTERS AND
SALES OFFICES
48720 Kato Road
Fremont, CA 94538 – USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7030
www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve
design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein,
conveys no license under any patent or other right, and makes no representation that the circuits are free of patent
infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a
user’s specific application. While the information in this publication has been carefully checked; no responsibility, however,
is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its
safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in
writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all
such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
© 2011 Exar Corporation
13/13
Rev. 1.1.0
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