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MT9700

器件型号:MT9700
器件类别:电源/电源管理    功率开关芯片   
厂商:西安航天民芯
西安航天民芯科技有限公司成立于2011年2月,公司依托雄厚的航天资源优势和品牌优势,以核心团队的技术优势为中心,专注于开发新能源汽车动力电池管理系统、动力电池充电管理芯片、电池电源管理系统芯片、智能家居和物联网芯片、电机管理系统芯片、高低压DC/DC、AC/DC转换器等系列化战略新兴产业电源管理芯片产品及解决方案。
厂商官网:http://www.aerosemi.com
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器件描述

低功耗负载开关/USB电源开关/限流保护开关

参数
参数名称属性值
属性参数值
商品目录功率开关芯片

MT9700产品介绍

CASC
AEROSEMI
80mΩ,Adjustable Fast Response
Current-Limited Power-Distribution Switch
GENERAL DESCRIPTION
The MT9700 is a cost-effective, low voltage,single
P-MOSFET load switch,optimized for self-powered
and bus-powered Universal Serial Bus (USB)
applications. This switch operates with inputs
ranging from 2.4V to 5.5V, making it ideal for both
3V and 5V systems. The switch's low R
DS(ON)
,
80mΩ ,meets USB voltage drop requirements. The
MT9700 is also protected from thermal overload
which limits power dissipation and junction
temperatures. Current limit threshold is
programmed with a resistor from SET to ground.
The quiescent supply current is typically 15μA at
switch on state. At switch off state the supply
current decreases to less than 1μA.The MT9700 is
available in SOT23-5 package.
MT9700
FEATURES
Compliant to USB Specifications
Integrated 80mΩ Power MOSFET
Low Supply Current
15μA Typical at Switch On State
1μA Typical at Switch Off State
Wide Input Voltage Range:2.4V to 5.5V
Fast Transient Response:<2μs
Reverse Current Flow Blocking
Thermal Shutdown Protection
Hot Plug-In Application (Soft-Start)
Available in a 5-Pin SOT23-5 Package
APPLICATIONS
USB Bus/Self Powered Hubs
USB Peripherals
Notebook Computers
Battery-Charger Circuits
Personal Communication Devices
TYPICAL APPLICATION
2
Current Limit(A)
Current Limit
V
IN
VIN
VOUT
MT9700
V
OUT
1.5
1
0.5
0
2
4
6
8
10
12
C
IN
10μF
SET
R
SET
GND
EN
C
OUT
10μF
Figure 1. Basic Application Circuit
MT9700 Rev1.0
R
SET
(kΩ)
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All Rights Reserved.
1
AEROSEMI
MT9700 Adjustable Current-Limited Power-Distribution Switch
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage………………..-0.3V to 7V
EN Voltages………………...-0.3V to (V
IN
+0.3V)
SET Voltage………………..-0.3V to (V
IN
+0.3V)
Power Dissipation………………………...0.4W
Thermal Resistance
θ
JC
……………….130°C/W
Thermal Resistance
θ
JA
……………….250°C/W
Junction Temperature(Note2)………..........150°C
Operating Temperature Range…….-40°C to 85°C
Lead Temperature(Soldering,10s)………...300°C
Storage Temperature Range……..-65°C to 150°C
ESD HBM(Human Body Mode)……………...2kV
ESD MM(Machine Mode)………………….200V
PACKAGE/ORDER INFORMATION
Order Part Number
TOP VIEW
VOUT
GND
SET
1
2
3
4
EN
5
VIN
Package
Top Marking
MT9700
SOT23-5
D00HAW
5-LEAD PLASTIC SOT-23
T
JMAX
= 150°C,
θ
JA
= 250°C/ W,
θ
JC
= 130°C/W
PIN DESCRIPTION
Pin Name
VOUT
GND
SET
EN
VIN
Pin Number
1
2
3
4
5
Description
Power-switch output
Ground connection; connect externally to Power PAD
External resistor used to set current-limit threshold
Enable input, logic high turns on power switch
Input voltage; connect a 10uF or greater ceramic capacitor from VIN to
GND as close to the IC as possible
MT9700 Rev1.0
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2
AEROSEMI
MT9700 Adjustable Current-Limited Power-Distribution Switch
ELECTRICAL CHARACTERISTICS
(Note 3)
(V
IN
=5V, T
A
=-40°C to 85°C, unless otherwise noted.)
PARAMETER
SYMBOL CONDITIONS
Input Voltage Range
V
IN
V
IN
=5V
Switch On Resistance
R
DS(ON)
V
IN
=3V
V
IN
=5V,EN=Active,
Operation Quiescent Current
I
Q
No load
Off Supply Current
I
Q(OFF)
V
IN
=5.5V,EN=Inactive
Off Switch Current
I
Q(SW_OFF)
V
IN
=5.5V,EN=Inactive
Under-voltage Lockout
V
UVLO
V
IN
Increasing
Under-voltage Lockout
ΔV
UVLO
V
IN
decreasing
Hysteresis
Current Limit Threshold
I
LIM
R
SET
=6.8kΩ
Logic-Low Voltage V
IL
V
IN
=2.5V to 5.5V
EN
Threshold
Logic-High Voltage V
IH
V
IN
=2.5V to 5.5V
EN=Inactive,
Output Leakage Current
I
LEAK
R
LOAD
=0Ω
Current Limit Response Time
T
RESP
V
IN
=5V
Thermal Shutdown Protection
T
SD
Thermal Shutdown Hysteresis
ΔT
SD
MIN
2.4
TYP
80
90
15
MAX
5.5
100
110
25
1
1
2.4
UNIT
V
μA
μA
μA
V
V
0.8
2
0.5
1
150
20
10
A
V
V
μA
μs
°C
°C
1.8
0.1
1
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: T
J
is calculated from the ambient temperature T
A
and power dissipation P
D
according to the
following formula: T
J
= T
A
+ (P
D
) x (250°C/W).
Note 3: 100% production test at 25°C. Specifications over the temperature range are guaranteed by design
and characterization.
MT9700 Rev1.0
www.aerosemi.com
Aerosemi Proprietary Information.Unauthorized Photocopy and Duplication Prohibited.
All Rights Reserved.
3
AEROSEMI
MT9700 Adjustable Current-Limited Power-Distribution Switch
TYPICAL PERFORMANCE CHARACTERISTICS
MT9700 TURN ON
2
Current Limit(A)
Current Limit
V
IN
=5V,C
OUT
=10uF,T
A
=25℃
1.5
1
0.5
0
2
4
6
8
10
12
R
SET
(kΩ)
MT9700 TURN OFF
V
IN
=5V,C
OUT
=10uF,T
A
=25℃
Short Response
V
IN
=5V,C
OUT
=10uF,T
A
=25℃
MT9700 Rev1.0
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Aerosemi Proprietary Information.Unauthorized Photocopy and Duplication Prohibited.
All Rights Reserved.
4
AEROSEMI
MT9700 Adjustable Current-Limited Power-Distribution Switch
FUNCTIONAL BLOCK DIAGRAM
-
+
Reverse
Voltage
Comparator
CS
Deglitch
VOUT
Reverse
Blocking
VIN
Current
Sense
EN
Driver
Current
Limit
UVLO
Thermal Sense
SET
GND
Figure 2. MT9700 Block Diagram
APPLICATIONS INFORMATION
The MT9700 is a single channel current limiting
load switch that is intended to protect against
short circuit and over current events by current
limiting to a preset level. This device is optimized
for self-powered and bus-powered Universal
Serial Bus (USB) applications. The switch's low
R
DS(ON)
, 80mΩ , meets USB voltage drop
requirements; and a flag output is available to
indicate fault conditions to the local USB
controller.
Input and Output
V
IN
(input) is the power source connection to the
internal circuitry and the source of the MOSFET.
V
OUT
(output) is the drain of the MOSFET. In a
typical application, current flows through the
switch from V
IN
to V
OUT
toward the load. If V
OUT
is
greater than V
IN
, current will flow from V
OUT
to V
IN
since the MOSFET is bidirectional when on. The
MT9700's reverse current blocking feature
prevents current to flow from V
OUT
to V
IN
when
the device is disabled.
Soft Start for Hot Plug-In Applications
In order to eliminate the upstream voltage droop
caused by the large inrush current during
hot-plug events,the “soft-start” feature effectively
isolates the power source from extremely large
capacitive loads,satisfying the USB voltage droop
requirements.
Input capacitor
The input capacitor C
IN
protects the power
supply from current transients generated by the
load attached to the MT9700. When a short
circuit is suddenly applied to the output of the
MT9700, a large current, limited only by the
R
DS(ON)
of the MOSFET, will flow for less than 2μs
before the current limit circuitry activates. In this
event, a moderately sized C
IN
will dramatically
reduce the voltage transient seen by the power
5
MT9700 Rev1.0
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Aerosemi Proprietary Information.Unauthorized Photocopy and Duplication Prohibited.
All Rights Reserved.
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