MP5006EQ [MPS]
Power Supply Support Circuit, Adjustable, 1 Channel, PDSO10, 3 X 3 MM, MO-229VEED-5, QFN-10;
| 型号： | MP5006EQ |
| 厂家： | 
MONOLITHIC POWER SYSTEMS |
| 描述： | Power Supply Support Circuit, Adjustable, 1 Channel, PDSO10, 3 X 3 MM, MO-229VEED-5, QFN-10 光电二极管 |
| 文件： | 总13页 (文件大小：355K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MP5006
5V, 1A- 5A Programmable Current
Limit Switch with Slew Rate Control and
Auto Enable
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP5006 is a protection device designed to
protect circuitry on the output (VOUT) from
transients on input (VIN). It also protects VIN from
undesired shorts and transients coming from the
load.
•
•
•
•
•
Integrated 44mΩ Power FET
Enable/Fault Pin
Adjustable Slew Rate for Output Voltage
Adjustable Current Limit
Automatic Startup/Retry after Thermal
Protection
At start up, inrush current is controlled by limiting
the slew rate at the VOUT. The slew rate is
controlled by a small capacitor at the dv/dt pin.
The dv/dt pin has an internal circuit that allows
the customer to float this pin (no connect) and
•
Over Voltage Limit
APPLICATIONS
•
•
•
•
•
Hot Swap
PC Cards
Laptops
SSD
still receive a 1.1ms ramp time at the VOUT
.
The max load at the output (VOUT) is current
limited. This is accomplished by utilizing a sense
FET topology. The magnitude of the current limit
is controlled by an external resistor connected
between the ILIMIT pins.
HDD
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
An internal charge pump drives the gate of the
power device, allowing a very low on-resistance
DMOS power FET of just 0.044Ω.
VOUT is protected from VIN being too low or too
high. Under Voltage Lockout (UVLO) assures
that the input is above the minimum operating
threshold, before the power device is turned on.
If VIN goes above the high output threshold, the
output voltage will be limited.
TYPICAL APPLICATION
VIN
11
VIN
6
5
+ILIMIT
VOUT
VOUT
VOUT
R
Limit
4
7
8
-ILIMIT
MP5006
Enable/Fault
3
2
1
EN
VOUT
VOUT
VOUT
9
dv/dt
C
dv/dt
(Optinal)
10
GND
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
MP5006EQ
QFN10 (3x3)
8M
–20°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP5006EQ–Z).
For RoHS Compliant Packaging, add suffix –LF (e.g. MP5006EQ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
GND
VOUT
VOUT
VOUT
VOUT
VOUT
1
2
3
4
5
10
9
dv/dt
EXPOSED
PAD
8
ENABLE/FAULT
-ILIMIT
VIN
7
6
+ILIMIT
ABSOLUTE MAXIMUM RATINGS (1)
VIN, VOUT, +ILIMIT, -ILIMIT .................................. 22V
dv/dt, ENABLE/FAULT .................................. 6V
Junction Temperature..................... –20°C to +150°C
Thermal Resistance (3)……..θJA θJC
QFN10 ....................................50 ...... 12...°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX) ， the junction-to-
(2)
Continuous Power Dissipation (TA=+25oC)
…………………………………………………2.5W
Storage Temperature.............. –65°C to +155°C
ambient thermal resistance θJA，and the ambient temperature
TA, the maximum allowable power dissipation at any ambient
temperature is calculated using: PD(MAX)=(TJ(MAX)-TA)/ θJA.
Exceeding the maximum allowable power dissipation will
cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
Recommended Operating Conditions
Input Voltage Operating Range ......... 4V to 10V
Operating Junct. Temp (TJ)....... –20°C to +125°C
Reduce 0.2 Watts for every 10oC ambient temperature
increasing
3) Measured on JESD51-7 4-layer board.
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
ELECTRICAL CHARACTERISTICS
VIN =5V, RLIMIT=24Ω, COUT=10μF, TJ=25°C, unless otherwise noted.
Parameters
Power FET
Symbol Condition
Min
Typ
Max
Units
Enabling
of
chip
a
to
12ꢀ
Delay Time
tDLY
ID=100mA with
resistive load
TJ=25°C
0.2
ms
44
95
82
ON Resistance
RDSon
VOFF
mꢀ
TJ=80°C, Note 4
VIN =18Vdc, Enable=0V,
RL=500ꢀ
Off State Output Voltage
120
mV
0.5 in2 pad, Note 4,
TJ=25°C
4.2
2.3
Continuous Current
ID
A
minimum copper, TJ=80°C
Thermal Shutdown
Shutdown Temperature
Under/Over Voltage Protection
TSD
Note 4
175
°C
Over Voltage Protection
VIN =8V
Turn on,
Output Clamping Voltage
Under Voltage Lockout
VCLAMP
VUVLO
VHYST
5
5.4
3.6
0.2
5.9
4.0
V
V
V
3.2
Voltage going high
Under Voltage Lockout (UVLO)
Hysteresis
Current Limit
Hold Current
Trip Current
ILIM-SS
ILIM-OL
RLIMIT=24ꢀ, Note 4
RLIMIT=24ꢀ, Note 4
1.2
2.3
1.55
3
1.9
3.7
A
A
dv/dt Circuit
Rise Time
Enable/Fault
Low Level Input Voltage
High Level Input Voltage
High State Maximum Voltage
Low Level Input Current (Sink)
Tr
Float dv/dt pin, Note 5
0.64
2.5
1.1
2.0
0.5
ms
VIL
VIH
VI (MAX)
IIL
Output Disabled
Output Enabled
V
V
V
4.8
-60
VENABLE=0V
-80
5
μA
Total number of chips that
can be connected for
simultaneous shutdown
Maximum Fanout for Fault Signal
Units
V
Maximum Voltage on Enable Pin
VMAX
Note 6
VIN
Total Device
Device Operational
Thermal Shutdown
1.5
1
2.0
3.0
Bias Current
IBIAS
VMIN
mA
V
Minimum Operating Voltage for
UVLO
Enable<0.5V
Notes:
4) Guaranteed by design.
5) Measured from 10% to 90%.
6) Maximum Input Voltage to be ≤ 6V if VIN > 6V. Maximum Input Voltage to be VIN if VIN ≤ 6V.
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
PIN FUNCTIONS
Pin #
1-5
6
Name
Description
VOUT
This pin is the VOUT of the internal power FET and the output terminal of the IC.
A resistor between these pins sets the overload and short circuit current limit levels.
A resistor between these pins sets the overload and short circuit current limit levels.
+ILIMIT
-ILIMIT
7
The Enable/Fault pin is a bi-directional interface. It can be used to enable the output
of the device by floating the pin, or disable the chip by pulling it to ground (using an
open drain or open collector device). If a thermal fault occurs, the voltage on this pin
will drive to ground, automatically.
8
9
Enable/Fault
dv/dt
The internal dv/dt circuit controls the slew rate of the output voltage at turn on. It has
an internal capacitor that allows it to ramp up over the period of 1.1ms. An external
capacitor can be added to this pin to increase the ramp time. If an additional time
delay is not required, this pin should be left open.
10
11
GND
VIN
Negative Input Voltage to the Device. This is used as the internal reference for the IC.
Positive input voltage to the device (Exposed Pad).
MP5006 Rev.0.92
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
TYPICAL PERFORMANCE CHARACTERISTICS
VIN =5V, VEN =3.3V, RLIMIT=24ꢀ, COUT =10μF, Cdv/dt =1nF, TA =25°C, unless otherwise noted.
Supply Current,Output Disabled
vs.Input Voltage
VEN=0V
Static Drain-Source On-State
Resistance vs. Input Voltage
IOUT=1A
Supply Current,Output Enabled
vs.Input Voltage
No load, EN floating
1.85
1.8
1
61
59
57
55
53
51
49
47
45
0.98
0.96
0.94
0.92
0.9
1.75
1.7
1.65
4
4.5
5
5.5
3.5
4
4.5
5
5.5
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
INPUT VOLTAGE(V)
INPUT VOLT AGE (V)
140
120
100
80
1.8
1.7
3.1
VIN=4V
3
2.9
2.8
2.7
2.6
VIN=4.5V
V
IN=5V
1.6
1.5
1.4
60
VIN=5.5V
40
20
0
0
0.5
1
1.5
2
2.5
3.5
4
4.5
5
5.5
3.5
4
4.5
5
5.5
LOAD CURRENT(A)
INPUT VOLTAGE(V)
INPUT VOLTAGE(V)
Trip and Hold Current
Current Limit Response
vs. Peak Current
No Cout
vs. R
LIMIT
6
5
4
3
2
1
0
16
12
8
Trip Current
Hold Current
20 40 60 80 100 120
4
0
3
6
9
12 15 18 21 24
PEAK CURRENT(A)
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN =5V, VEN =3.3V, RLIMIT=24ꢀ, COUT =10μF, Cdv/dt =1nF, TA =25°C, unless otherwise noted.
Turn on Delay and Rise Time
Cdv/dt=1nF,COUT=10uF,no load
Turn on Delay and Rise Time
No Cdv/dt,COUT=10uF,no load
Turn off Delay and Fall Time
No Cdv/dt,COUT=10uF,no load
V
OUT
V
V
OUT
OUT
2V/div
2V/div
2V/div
EN
2V/div
EN
2V/div
EN
2V/div
10ms/div
400us/div
400ms/div
Short Circuit Current,
Device Enabled into Short
No Cdv/dt
V
OUT
V
OUT
EN
2V/div
2V/div
2V/div
EN
EN
2V/div
2V/div
I
OUT
I
OUT
I
OUT
1A/div
1A/div
1A/div
400us/div
100us/div
100us/div
Short Circuit Current,
Device Enabled into Short,
and Thermal Shut down
and Auto Start Up
Trip Current with Ramped
Load on Enabled Device
No Cdv/dt
Inrush Current with Different
Load Capacitance
No Cdv/dt
EN Floating, No Cdv/dt
V
2200uF
OUT
EN
2V/div
EN
2V/div
2V/div
1000uF
470uF
I
I
I
OUT
OUT
OUT
500mA/div
1A/div
1A/div
100ms/div
4ms/div
1ms/div
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN =5V, VEN =3.3V, RLIMIT=24ꢀ, COUT =10μF, Cdv/dt =1nF, TA =25°C, unless otherwise noted.
Current Limit
(trip hold thermal shut down)
Auto Start Up)
No Cdv/dt
V
V
V
OUT
2V/div
OUT
2V/div
OUT
2V/div
Peak Current
Peak Current
Response Time
I
I
I
OUT
OUT
2A/div
OUT
1A/div
2A/div
Response Time
20us/div
20us/div
100ms/div
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
BLOCK DIAGRAM
V
IN
Enable/
Fault
Charge
Pump
Enable
VOUT
Thermal
Shutdown
Current
Limit
-ILIMIT
+ILIMIT
UVLO
dv/dt
Control
Voltage
Clamp
dv/dt
GND
Figure 1—Function Block Diagram
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
CURRENT LIMIT
RISE TIME
The desired current limit is a function of the
external current limit resistor.
The rise time is a function of the capacitor (Cdv/dt
on the dv/dt pin.
)
Table 1―Current Limit vs. Current Limit Resistor
(VIN =5V)
Table 2―Rise Time vs. Cdv/dt
Cdv/dt
Rise Time*
(TYPICAL)
(ms)
none 50pF 500pF 1nF
Current Limit Resistor
24
3
50
2
75
1.78
0.5
100
1.67
0.38
1.1 2.2 12.3 23.5
(ꢀ)
Trip Current
(A)
Hold Current
(A)
* Notes: Rise Time = KRT*(50pF+Cdv/dt), KRT =22E6
1.55
0.76
The “rise time” is measured by from 10% to 90%
of output voltage.
U
When the part is active, if load reaches trip
current (minimum threshold current triggering
overcurrent protection) or a short is present, the
part switches into to a constant-current (hold
current) mode. Part will enter thermal cycling only
if the overcurrent condition stays long enough to
trigger thermal protection.
Input
Output
90%
Enable
However, when the part is powered up by VCC or
EN, the load current should be smaller than hold
current. Otherwise, the part can’t be fully turned
on.
10%
t
Rise Time
Figure 2―Rise Time
In a typical application using a current limit
resistor of 24ꢀ, the trip current will be 3A and the
hold current will be 1.55A. If the device is in its
normal operating state and passing 1.55A it will
need to dissipate only 105.7mW with the very low
on resistance of 44mꢀ. For the package
dissipation of 50°C/Watt, the temperature rise will
only be + 5.3°C. Combined with a 25°C ambient,
this is only 30.3°C total package temperature.
FAULT AND ENABLE PIN
The Enable/Fault Pin is a Bi-Directional I/O with a
weak pull up current (25uA typical). It functions to
enable/disable the part.
Enable pin as an input:
1. Low disables the part.
2. High enables the part.
Enable pin as an output:
During a short circuit condition, the device now
has 5V across it and the hold current clamps at
1.55A and therefore must dissipate 7.75W. At
50°C/watt, if uncontrolled, the temperature would
rise above the MP5006 thermal protection
(+175°C) and shutdown the device to cause the
temperature to drop below a hysteresis level.
Proper heat sink must be used if the device is
intended to supply the hold current and not
shutdown. Without a heat sink, hold current
should be maintained below 600mA at + 25°C
and below 360mA at +85°C to prevent the device
from activating the thermal shutdown.
1. The pull up current may (if not over
ridden) allow a “wired nor” pull up to
enable the part.
2. An under voltage will cause a low on the
enable pin.
3. A thermal fault will cause a low level on
the enable pin.
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
There are 4 types of faults, and each fault has a
direct and indirect effect on the Enable/Fault pin
and the internal fault flag. In a typical application
there are one or more of the MP5006 chips in a
system. The Enable/Fault lines will typically be
connected together.
Table 3―Fault Function Influence in Application
Fault description Internal action Effect on Fault Pin
Effect on Flag
None
Effect on secondary Part
none
Short/over current
Limit current
none
Internally drives
Enable/Fault pin to
Logic low
Secondary part output is
disabled, and fault flag is
reset.
Output is
turned off
Under Voltage
Flag is reset
None
Limit output
voltage
Over Voltage
None
None
Internally drives
Enable/Fault pin
to low level, and
after part cools
down, Enable/Fault to high after
pin will be pulled
high
Flag is set at
thermal shut
down, and is set
Shutdown part.
The part retries
to start up
Secondary part output is
disabled when thermal shut
down, and is enabled after
MP5006 auto start up.
Thermal Shutdown
automatically
auto start up.
MP5006 Rev.0.92
12/27/2013
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
THERMAL PROTECTION
The MP5006 only considers a thermal overload
to be a fault. Under a fault condition the mp5006
will have two actions:
through a 25uA pull up current. If the cause of
the fault has been removed, the output will ramp
up in a controlled fashion with the ramp rate
controlled by the dv/dt function. If the cause of
the fault is still present, the excess power
dissipation will heat up the part. When the die
temperature reaches the thermal shutdown
temperature, the output will be turned off and the
enable/fault pin will be driven to the low level,
again. This cycle will repeat until the cause of the
fault is removed.
1) Turn off the output power device.
2) Drive the enable/fault pin to the low level.
The power device will remain off until the die
temperature drops below the hysteresis level.
When the die cools down below the thermal
hysteresis level, the MP5006 will restart in the
start up mode and the fault line will be pulled high
Figure 3―Thermal Protection in Short Condition
The drawing above shows the initial start up
sequence and the occurrence of a short at the
output.
there by the MP5006. Because of the large
current and the large voltage across the power
device, the die will begin to heat up.
At time T0 the input voltage begins to rise. At T1
the input voltage rises above the UVLO threshold
and the part starts up. The output current ramps
up and settles at the normal operating current
level until time T2. There is a very small
temperature heating of the die in normal
operation.
At time T3 the die temperature is at the thermal
shutdown level and the part will turn the power
device off. The enable/fault pin is driven to the
low level. Once the power device is off, the die
temperature will begin to drop.
At time T4 the part has cooled down below the
thermal hysteresis level. The enable pin goes
high and the part turns on again. But the short is
still present, causing the die temperature to
increase.
At time T2 the output is shorted. This brings the
output very close to ground. The output current
increases to the current limit level and is held
MP5006 Rev.0.92
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
At time T5 the power device turns off and the
Enable/Fault pin is driven to the low level, again.
The temperature begins to fall.
When the supply goes above the UVLO
threshold, the output is enabled and the
Enable/fault pin is released. When the
Enable/fault pin is released it will be pulled high
by a 25uA current VOUT. No external pull up
resistor is required. In addition, the pull up
voltage is limited to 5 volts.
The cycle between times T3, T4 and T5 could
repeat indefinitely, but at time T6 the short is
removed. At time T7 the die temperature is below
the thermal hysteresis level and the part turns on
once again. This time there is no short, so the
output starts in normal operation and the die
temperature cools down to the normal operating
range.
PCB LAYOUT
PCB layout is very important to achieve stable
operation. Please follow these guidelines and
take below Figure for reference.
UNDER VOLTAGE LOCK OUT OPERATION
Place Rlimit close to Ilimit pin, Cdv/dt close to
dv/dt pin and input cap close to VIN (Exposed
Pad). Keep the N/C pin float. Put vias in thermal
pad and ensure enough copper area near VIN
and VOUT to achieve better thermal performance.
If the supply (input) is below the UVLO threshold,
the output is disabled, and the fault line is driven
low.
Top Layer
Bottom Layer
Figure 4―PCB Layout
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MP5006 – 5V, 1A- 5A PROGRAMMABLE CURRENT LIMIT SWITCH WITH AUTO ENABLE
PACKAGE INFORMATION
QFN10 (3mm x 3mm)
2.90
3.10
0.30
0.50
1.45
1.75
PIN 1 ID
SEE DETAIL A
PIN 1 ID
MARKING
0.18
10
1
5
0.30
2.25
2.55
2.90
3.10
PIN 1 ID
INDEX AREA
0.50
BSC
6
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
R0.20 TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.80
1.00
0.20 REF
0.00
0.05
SIDE VIEW
DETAIL A
NOTE:
2.90
1.70
1) ALL DIMENSIONS ARE IN MILLIMETERS.
0.70
0.25
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.
4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VEED-5.
5) DRAWING IS NOT TO SCALE.
2.50
0.50
RECOMMENDED LAND PATTERN
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP5006 Rev. 0.92
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