MIC2033-10BYM6-T5 [MICROCHIP]
Power Supply Support Circuit;
| 型号： | MIC2033-10BYM6-T5 |
| 厂家： | 
MICROCHIP |
| 描述： | Power Supply Support Circuit 光电二极管 |
| 文件： | 总21页 (文件大小：665K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC2033
High-Accuracy, High-Side, Fixed
Current Limit Power Switch
General Description
Features
The MIC2033 is a high-side MOSFET power distribution
switch providing increased system reliability utilizing 5%
current limit accuracy.
• ±5% current limit accuracy
• Input supply range from 2.5V to 5.5V
• Low quiescent current: 100µA typical (switch ON)
• 75mΩ typical RDS(ON) at 5V
• Current limit options: 0.5A, 0.8A, 1A, and 1.2A
• Soft-start control via an external capacitor
• Undervoltage lockout (UVLO)
• Fast response time (10µs) to short circuit loads
• Fault status output flag
• Logic controlled enable (active-high, active-low)
• Thermal shutdown
The MIC2033 has an operating input voltage range from
2.5V to 5.5V, is internally current limited and has thermal
shutdown to protect the device and system. The MIC2033
is offered with either active-high or active-low logic level
enable input controls, has an open drain fault status output
flag with a built-in 32ms delay that asserts low during over
current or thermal shutdown conditions.
The MIC2033 is available in several different fixed current
limit options: 0.5A, 0.8A, 1A, and 1.2A. A capacitor
adjustable soft-start circuit minimizes inrush current in
applications where high capacitive loads are used.
• Pin compatible with MIC2005
The MIC2033 is offered in both 6-pin SOT-23 and 6-pin
2mm x 2mm thin DFN packages. The MIC2033 has an
operating junction temperature range of −40°C to +125°C.
• 6-pin 2mm × 2mm thin DFN and 6-pin SOT-23
packages
• Junction temperature range from −40°C to +125°C
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Applications
• USB peripherals and USB 2.0/3.0 compatible
• DTV/STB
• Notebooks and consumer electronics
• General purpose power distribution
____________________________________________________________________________________________________________
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Revision 1.1
November 11, 2015
Micrel, Inc.
MIC2033
Ordering Information
Part Number
Top Mark(1)
Current Limit
0.5A
Enable
Package
SOT-23-6L
SOT-23-6L
MIC2033-05AYM6
MIC2033-05BYM6
MIC2033-05AYMT(2)
MIC2033-05BYMT(2)
MIC2033-55AYM6(3)
MIC2033-55AYMT(2)(3)
MIC2033-08AYM6
MIC2033-08BYM6
MIC2033-08AYMT(2)
MIC2033-08BYMT(2)
MIC2033-10AYM6
MIC2033-10BYM6
MIC2033-10AYMT(2)
MIC2033-10BYMT(2)
MIC2033-12AYM6
MIC2033-12BYM6
MIC2033-12AYMT(2)
MIC2033-12BYMT(2)
35A
35B
3A5
3B5
55A
5A5
38A
38B
3A8
3B8
31A
31B
3A1
3B1
32A
32B
3A2
3B2
Active High
Active Low
Active High
Active Low
Active High
Active High
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
Active High
Active Low
0.5A
0.5A
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
0.5A
0.55A
0.55A
0.8A
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
0.8A
SOT-23-6L
0.8A
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
0.8A
1.0A
1.0A
SOT-23-6L
1.0A
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
1.0A
1.2A
1.2A
SOT-23-6L
1.2A
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
1.2A
Notes:
1. Under bar symbol ( _ ) may not be to scale.
2. Thin DFN is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
3. Contact Micrel for availability.
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MIC2033
Pin Configuration
1
2
3
6
5
4
VIN
GND
EN
1
2
3
6
5
4
VOUT
VOUT
CSLEW
FAULT/
VIN
CSLEW
FAULT/
EP
GND
EN
SOT-23 6-Lead (M6)
Top View
2mm x 2mm 6-pin Thin DFN (MT)(1)
Top View
Notes:
1. Thin DFN ▲ = Pin 1 identifier.
Pin Description
Pin Number
Pin
Name
6-pin
2mm x 2mm
Thin DFN
Pin Function
SOT-23-6L
1
2
6
5
VIN
Input: Power switch and logic supply input.
Ground: Input and output return pin.
GND
Enable (Input): Logic compatible, enable control input that allows turn-on/-off of
the switch. Do not leave the EN pin floating.
3
4
EN
Fault Status Flag (Output): Active-low, open-drain output. A logic LOW state
indicates an over current or thermal shutdown condition. An over current condition
must last longer than tFAULT/ in order to assert FAULT/. A pull-up resistor (10kΩ
recommended) to an external supply is required.
4
3
FAULT/
Slew Rate Control: Adjustable soft-start input. Adding a small value capacitor from
CSLEW to VIN slows the turn-on time of the power MOSFET.
5
6
2
1
CSLEW
VOUT
Switch Output: Power switch output.
Exposed Pad: Exposed pad on bottom side of package. Connect to electrical
ground for optimum thermal dissipation.
—
EP
ePad
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MIC2033
Absolute Maximum Ratings(1)
Operating Ratings(3)
Supply Voltage (VIN)..................................... +2.5V to +5.5V
VEN, VFAULT/ ................................................... −0.3V to +5.5V
VCSLEW, VOUT ...................................................... −0.3V to VIN
Ambient Temperature Range (TA) ..............–40°C to +85°C
Junction Temperature (TJ) ........................–40°C to +125°C
Package Thermal Resistance
VIN to GND....................................................... −0.3V to +6V
VOUT to GND......................................................−0.3V to VIN
VCSLEW to GND................................................. −0.3V to +6V
VEN to GND...................................................... −0.3V to +6V
VFAULT/ to GND................................................. −0.3V to +6V
FAULT/ Current (IFAULT/) ..............................................25mA
Maximum Power Dissipation (PD) .............Internally Limited
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (TS).........................−65°C to +150°C
ESD Rating(2)
SOT-23-6 (θJA)..............................................177.2°C/W
6-pin 2mm × 2mm DFN (θJA) .............................90°C/W
HBM.........................................................................3kV
MM.........................................................................300V
Electrical Characteristics(4)
VIN = VEN = 5V; CIN = 1µF; CCSLEW = 0.1µF; COUT = 1µF; TJ = 25°C. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Power Supply Input
Input Voltage
Range
2.5
2.0
5.5
2.5
VIN
V
V
Input Supply
Undervoltage
Lockout
VIN rising
VIN falling
2.25
2.15
VUVLO
1.9
2.4
Threshold
Input Supply
Undervoltage
Lockout
VUVLOHYS
VIN rising or VIN falling
100
mV
Threshold
Hysteresis
Switch OFF; Active High enable (A): VEN
0V, VIN = 5V, IOUT = 0A
=
=
5
0.75
100
µA
µA
Switch OFF; Active Low Enable (B): VEN
VIN = 5V, IOUT = 0A
IDD
Supply Current
Switch ON; Active High Enable (A): VEN
1.5V, VIN = 5V, IOUT = 0A
=
300
Switch ON; Active Low Enable (B): VEN
0V, VIN = 5V, IOUT = 0A
=
Power MOSFET
Switch On-
177
145
125
VIN = 2.5V, IOUT = 350mA
VIN = 3.3V, IOUT = 350mA
VIN = 5V, IOUT = 350mA
100
85
RDS-ON
mΩ
Resistance
75
Output
15
ILKG
Leakage
Current
Switch OFF, VOUT = 0V
0.22
µA
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MIC2033
Electrical Characteristics(4) (Continued)
VIN = VEN = 5V; CIN = 1µF; CCSLEW = 0.1µF; COUT = 1µF; TJ = 25°C. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Current Limit
MIC2033-05xxxx, VOUT = 0.8*VIN
MIC2033-08xxxx, VOUT = 0.8*VIN
MIC2033-10xxxx, VOUT = 0.8*VIN
MIC2033-12xxxx, VOUT = 0.8*VIN
0.475
0.76
0.95
1.14
0.5
0.8
1.0
1.2
0.525
0.84
1.05
1.26
Current Limit
Accuracy
ILIMIT
A
I/O
0.5
Logic Low
Logic High
VEN
Enable Voltage
V
1.5
Enable Input
Current
IEN
0V ≤ VEN ≤ 5V
1
µA
Fault Flag
Output
25
RFLAG
IOUT = 10mA
Ω
Resistance
Fault Flag Off
Current
IFLAG_OFF
RFAULT/
IFAULT/_OFF
ICSLEW
VFLAG = VIN
IOUT = 10mA
VFAULT/ = VIN
10
25
10
µA
Ω
FAULT/ Output
Resistance
FAULT/ Off
Current
µA
µA
CSLEW Input
Current(6)
V
CSLEW = VIN
0.6
Thermal Protection
Thermal
TTSD
Shutdown
Temperature
TJ Rising
157
15
°C
°C
Thermal
Shutdown
Hysteresis
TTSDHYS
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MIC2033
Electrical Characteristics(4) (Continued)
VIN = VEN = 5V; CIN = 1µF; CCSLEW = 0.1µF; COUT = 1µF; TJ = 25°C. Bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Timing Specifications (AC Parameters)
tRISE
tFALL
tON_DLY
tOFF_DLY
Output Turn-on Rise Time(6)
Output Turn-off Fall Time(6)
Output Turn-on Delay(6)
Output Turn-off Delay(6)
RLOAD = 10Ω; COUT = 1µF
700
32
µs
µs
µs
µs
VEN = OFF; RLOAD = 10Ω; COUT = 1µF
RLOAD = 10Ω; COUT = 1µF
700
5
RLOAD = 10Ω; COUT = 1µF
Short Circuit Response
Time(6,7)
tSC_RESP
tSC_RESP
tFAULT/
VOUT = 0V (short circuit); CCSLEW = 0.1µF
10
10
32
ms
µs
Short Circuit Response
Time(6)
V
OUT = 0V (short circuit); CCSLEW = OPEN
Overcurrent Fault Response
Delay Time(6)
16
49
ms
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. Devices are ESD sensitive. Handling precautions recommended. Human body model (HBM), 1.5kΩ in series with 100pF.
3. The device is not guaranteed to function outside its operating rating.
4. Specification for packaged product only.
5. Preliminary.
6. See Timing Diagrams (Figures 1-3).
7.
CCSLEW values above 0.1µF are not recommended.
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MIC2033
Timing Diagrams
V
EN
0
tFALL
tRISE
90%
90%
VOUT
10%
10%
0
t
Figure 1. Output Rise/Fall Time
V
EN
50%
50%
0
tON_DLY
tOFF_DLY
90%
VOUT
10%
0
t
Figure 2. Turn-On/Off Delay
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MIC2033
Timing Diagrams (Continued)
V
FAULT/
0
tFAULT/
VOUT
0
tSC_RESP
ILIMIT
IOUT
0
t
Figure 3. Short Circuit Response Time and Over Current Fault Flag Delay
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MIC2033
Typical Characteristics
Input Supply Current
vs. Temperature
VIN OFF Current
vs. Temperature
Undervoltage Lockout
vs. Temperature
2.50
2.25
2.00
1.75
1.50
200
1.50
1.25
1.00
0.75
0.50
0.25
0.00
VIN = 5V
175
VIN = 5V
VEN = OFF
OUT = 0mA
IOUT = 0mA
VIN Rising
VIN Falling
150
125
100
75
I
50
25
0
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
125
500
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
RDS(ON)
RDS(ON)
RDS(ON)
vs. Temperature
vs. Temperature
vs. Output Current
125
100
75
50
25
0
125
100
75
50
25
0
125
VIN = 5V
VIN = 5V
VIN = 5V
I
OUT = 350mA
TA = 25°C
IOUT = 350mA
MIC2033-12xx
MIC2033-05xx
100
75
50
25
0
MIC2033-05xx
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
125
0
100
200
300
400
500
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
RDS(ON)
RDS(ON)
RDS(ON)
vs. Output Current
vs. Output Current
vs. Output Current
125
100
75
50
25
0
125
100
75
50
25
0
125
100
75
50
25
0
VIN = 3.3V
VIN = 3.3V
VIN = 5V
TA = 25°C
TA = 25°C
TA = 25°C
MIC2033-12xx
MIC2033-05xx
MIC2033-12xx
0
100
200
300
400
0.00
0.25
0.50
0.75
1.00
1.25
0.00
0.25
0.50
0.75
1.00
1.25
OUTPUT CURRENT (mA)
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
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MIC2033
Typical Characteristics (Continued)
Current Limit
vs. Temperature
Current Limit
vs. Temperature
Current Limit
vs. Temperature
1200
1.50
1.25
1.00
0.75
0.50
0.25
0.00
600
550
500
450
400
VIN = 5V
VOUT = 4V
VIN = 5V
OUT = 4V
MIC2033-05xx
1000
800
600
400
200
0
MIC2033-10xx
V
VIN = 5V
VOUT = 4V
MIC2033-08xx
-50
-20
10
40
70
100
130
-50
-20
10
40
70
100
130
-50
-25
0
25
50
75
100
125
125
125
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
VIN - VOUT
VIN - VOUT
vs. Output Current
Current Limit
vs. Temperature
vs. Output Current
125
1.30
1.25
1.20
1.15
1.10
50
VIN = 5V
VIN = 5V
VIN = 5V
OUT = 4V
MIC2033-12xx
TA = 25°C
TA = 25°C
100
75
50
25
0
40
30
20
10
0
MIC2033-12xx
V
MIC2033-05xx
0
100
200
300
400
500
0.00
0.25
0.50
0.75
1.00
1.25
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
OUTPUT CURRENT (mA)
OUTPUT CURRENT (A)
FAULT/ Pin Resistance
vs. Temperature
FAULT/ Response Time
vs. Temperature
25
20
15
10
5
50
40
30
20
10
0
V
IN = 5V
VIN = 5V
IFLAG = 10mA
MIC2033-xxxx
0
-50
-25
0
25
50
75
100
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
TEMPERATURE (°C)
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MIC2033
Functional Characteristics
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MIC2033
Functional Characteristics (Continued)
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Micrel, Inc.
MIC2033
Functional Diagram
Figure 4. MIC2033 Block Diagram
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Micrel, Inc.
MIC2033
directly tied to VIN or driven by a voltage that is equal to
or less than VIN, but do not leave this pin floating.
Functional Description
The MIC2033 is a high-side MOSFET power distribution
switch providing increased system reliability utilizing 5%
current limit accuracy. The MIC2033 has an operating
input voltage range from 2.5V to 5.5V and is internally
current limited and has thermal shutdown that protects
the device and system.
Current Limit
The MIC2033 is available with four fixed current limit
settings: 0.5A, 0.8A, 1A, and 1.2A. If the output current
exceeds the set current limit, then the MIC2033 switch
will enter constant current limit mode. The maximum
allowable current limit may be less than the full specified
and/or expected current if the MIC2033 is not mounted
on a circuit board with sufficiently low thermal resistance.
The MIC2033 responds within 10µs to short circuits to
limit the output current and also provides an output fault
flag that will assert (low) for an over current condition
that lasts longer than 32ms.
Soft-Start
Soft-start reduces the power supply input surge current
at startup by controlling the output voltage rise time. The
input surge appears while the output capacitor is
charged up. A slower output rise time will draw a lower
input surge current.
During soft-start, an internal current sink discharges the
external capacitor at CSLEW to ground to control the
ramp of the output voltage. The output voltage rise time
is dependent upon the value of CCSLEW, the input voltage,
output voltage, and the current limit. The value of the
CSLEW external capacitor is recommended to be in the
range of 0µF to 0.1µF.
Thermal Design
To help reduce the thermal resistance, the ePad
(underneath the IC) should be soldered to the PCB
ground and the placement of thermal vias either
underneath or near the ePad is highly recommended.
Thermal design requires the following application-
specific parameters:
Input Capacitor
• Maximum ambient temperature (TA)
A 1µF to 10µF ceramic input capacitor is recommended
for most applications.
• Output current (IOUT
• Input voltage (VIN)
)
The input capacitor must be placed on the same side of
the board and next to the MIC2033 to minimize the
voltage ringing during transient and short circuit
conditions. It is also recommended to use two vias for
each end of the capacitor to connect to the power and
ground plane.
• Current Limit (ILIMIT
)
When the MIC2033 is in constant current limit mode, it
may exceed the over temperature threshold. If this
occurs, the over temperature condition will shut down
the MIC2033 switch and the fault status flag will go
active (assert low). After the switch cools down, it will
turn on again. The MIC2033 power dissipation can be
maximized by either lowering the thermal resistance on
the exposed pad (only the DFN package has an
exposed pad) on the printed circuit board, or by limiting
the maximum allowable ambient temperature.
X7R or X5R dielectric ceramic capacitors are
recommended
because
of
their
temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
50% and 60% respectively over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic or a tantalum capacitor to ensure the
same capacitance value over the operating temperature
range.
Thermal Measurements
It is always wise to measure the IC’s case temperature
to make sure that it is within its operating limits. Although
this might seem like a very elementary task, it is very
easy to get erroneous results. The most common
mistake is to use the standard thermal couple that
comes with the thermal voltage meter. This thermal
couple wire gauge is large, typically 22 gauge, and
behaves like a heatsink, resulting in a lower case
measurement.
Output Capacitor
The output capacitor type and placement criteria are the
same as the input capacitor. See the Input Capacitor
section for a detailed description.
There are two suggested methods for measuring the IC
case temperature: a thermal couple or an infrared
thermometer. If a thermal couple is used, it must be
constructed of 36 gauge wire or higher to minimize the
wire heatsinking effect. In addition, the thermal couple tip
must be covered in either thermal grease or thermal glue
Enable
The MIC2033 offers either an active high or active low
enable input (EN) that allows ON/OFF control of the
switch output. The current through the device reduces to
near “zero” when the device is shutdown, with only
microamperes of leakage current. The EN input may be
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MIC2033
to make sure that the thermal couple junction is making
good contact to the case of the IC. This thermal couple
from Omega (5SC-TT-K-36-36) is adequate for most
applications.
thermometers’ spot size is too large for an accurate
reading on small form factor ICs. However, an IR
thermometer from Optris has a 1mm spot size, which
makes it ideal for the 3mm × 3mm DFN package. Also,
get the optional stand. The stand makes it easy to hold
the beam on the IC for long periods of time.
To avoid this messy thermal couple grease or glue, an
infrared thermometer is recommended. Most infrared
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MIC2033
Evaluation Board Schematic
Bill of Materials
Item
Part Number
Manufacturer
TDK(1)
Description
Qty.
C1608X5R0J105K
06036D105KAT2A
C1
1µF/6.3V ceramic capacitor, X5R, 0603
1
AVX(2)
C2
C3
CL31A107MQHNNNE
Samsung(3)
100µF/6.3V ceramic capacitor, X5R, 1206
0.1µF/25V ceramic capacitor, X7R, 0603
1
1
06033C104KAT2A
C1608X7R1E104K
TDK
AVX
R1,
R2
CRCW060310K0FKEA
Vishay(4)
10kΩ, film resistor, 0603, 1%
2
High-Accuracy, High-Side, Fixed Current Limit
Power Switch
U1
MIC2033-xxxYMT
Micrel, Inc.(5)
1
Notes:
1. TDK: www.tdk.com.
2. AVX.: www.avx.com.
3. Samsung: www.semlcr.com
4. Vishay: www.vishay.com.
5. Micrel, Inc.: www.micrel.com
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MIC2033
PCB Layout (MIC2033-xxxYMT Evaluation Board)
MIC2033-xxxYMT Evaluation Board – Top Layer
MIC2033-xxxYMT Evaluation Board – Bottom Layer
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MIC2033
PCB Layout (MIC2033-xxxYM6 Evaluation Board)
MIC2033-xxxYM6 Evaluation Board – Top Layer
MIC2033-xxxYM6 Evaluation Board – Bottom Layer
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MIC2033
Package Information
6-Pin 2mm x 2mm Thin DFN (MT)
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Micrel, Inc.
MIC2033
Package Information (Continued)
SOT23-6L (M6)
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MIC2033
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high-performance linear and power, LAN, and timing & communications
markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock
management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company
customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.
Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and
advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network
of distributors and reps worldwide.
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
November 11, 2015
21
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