MIC2033
High-Accuracy, High-Side, Fixed
Current Limit Power Switch
General 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, 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.
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.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
±5% current limit accuracy
Input supply range from 2.5V to 5.5V
Low quiescent current: 100µA typical (switch ON)
75mΩ typical R
DS(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
Pin compatible with MIC2005
6-pin 2mm
2mm thin DFN and 6-pin SOT-23
packages
Junction temperature range from
40°C
to +125°C
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
August 2012
M9999-082012-A
Micrel, Inc.
MIC2033
Ordering Information
Part Number
MIC2033-05AYM6
MIC2033-05BYM6
MIC2033-05AYMT
MIC2033-05BYMT
MIC2033-55AYM6*
MIC2033-55AYMT*
MIC2033-08AYM6
MIC2033-08BYM6
MIC2033-08AYMT
MIC2033-08BYMT
MIC2033-10AYM6
MIC2033-10BYM6
MIC2033-10AYMT
MIC2033-10BYMT
MIC2033-12AYM6
MIC2033-12BYM6
MIC2033-12AYMT
MIC2033-12BYMT
Notes:
1.
2.
3.
Under bar symbol ( _ ) may not be to scale.
Thin DFN is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
* Contact Micrel for availability.
Top Mark
35A
35B
3A5
3B5
55A
5A5
38A
38B
3A8
3B8
31A
31B
3A1
3B1
32A
32B
3A2
3B2
Current Limit
0.5A
0.5A
0.5A
0.5A
0.55A
0.55A
0.8A
0.8A
0.8A
0.8A
1.0A
1.0A
1.0A
1.0A
1.2A
1.2A
1.2A
1.2A
Enable
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
Package
SOT-23-6L
SOT-23-6L
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
SOT-23-6L
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
SOT-23-6L
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
SOT-23-6L
SOT-23-6L
6-pin 2mm x 2mm Thin DFN
6-pin 2mm x 2mm Thin DFN
August 2012
2
M9999-082012-A
Micrel, Inc.
MIC2033
Pin Configuration
SOT-23 6-Lead (M6)
Top View
Notes:
1.
Thin DFN
▲
= Pin 1 identifier.
2mm x 2mm 6-pin Thin DFN (MT)
Top View
Pin Description
Pin Number
SOT-23-6L
1
2
3
6-pin
2mmx2mm
Thin DFN
6
5
4
Pin
Name
VIN
GND
EN
Pin Function
Input: Power switch and logic supply input.
Ground: Input and output return pin.
Enable (Input): Logic compatible, enable control input that allows turn-on/-off of
the switch. Do not leave the EN pin floating.
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 t
FAULT/
in order to assert FAULT/. A pull-up resistor (10kΩ
recommended) to an external supply is required.
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.
Switch Output: Power switch output.
Exposed Pad: Exposed pad on bottom side of package. Connect to electrical
ground for optimum thermal dissipation.
4
3
FAULT/
5
6
—
2
1
EP
CSLEW
VOUT
ePad
August 2012
3
M9999-082012-A
Micrel, Inc.
MIC2033
Absolute Maximum Ratings
(1)
V
IN
to GND.......................................................
0.3V
to +6V
V
OUT
to GND ......................................................
0.3V
to V
IN
V
CSLEW
to GND.................................................
0.3V
to +6V
V
EN
to GND......................................................
0.3V
to +6V
V
FAULT/
to GND.................................................
0.3V
to +6V
FAULT/ Current (I
FAULT/
) ..............................................25mA
Maximum Power Dissipation (P
D
) .............Internally Limited
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (T
S
).........................65°C to +150°C
ESD Rating
(2)
HBM ......................................................................... 3kV
MM .........................................................................300V
Operating Ratings
(3)
Supply Voltage (V
IN
)..................................... +2.5V to +5.5V
V
EN
, V
FAULT/
...................................................
0.3V
to +5.5V
V
CSLEW
, V
OUT
......................................................
0.3V
to V
IN
Ambient Temperature Range (T
A
) .............. –40°C to +85°C
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
SOT-23-6 (
JA
) ..............................................177.2°C/W
6-pin 2mm
2mm DFN (
JA
) .............................90°C/W
Electrical Characteristics
(4)
V
IN
= V
EN
= 5V; C
IN
= 1µF; C
CSLEW
= 0.1µF; C
OUT
= 1µF; T
J
= 25°C.
Bold
values indicate –40°C
≤
T
J
≤
+125°C, unless noted.
Symbol
V
IN
V
UVLO
V
UVLOHYS
Parameter
Input Voltage Range
Input Supply Under-voltage
Lockout Threshold
Input Supply Under-voltage
Lockout Threshold Hysteresis
V
IN
rising
V
IN
falling
V
IN
rising or V
IN
falling
Switch
OFF
(I
OUT
= 0A)
I
DD
Supply Current
Switch ON
(I
OUT
= 0A)
Power MOSFET
V
IN
= 2.5V, I
OUT
= 350mA
R
DS(ON)
Switch On-Resistance
V
IN
= 3.3V, I
OUT
= 350mA
V
IN
= 5V, I
OUT
= 350mA
I
LKG
Output Leakage Current
Switch Off, V
OUT
= 0V
MIC2033-05xxxx, V
OUT
= 0.8 x V
IN
MIC2033-55xxx, V
OUT
= 0.8 x V
IN(5)
I
LIMIT
Current Limit
MIC2033-08xxxx, V
OUT
= 0.8 x V
IN
MIC2033-10xxxx, V
OUT
= 0.8 x V
IN
MIC2033-12xxxx, V
OUT
= 0.8 x V
IN
I/O
Logic Low
V
EN
Enable Voltage
Logic High
1.5
0.5
V
0.475
0.517
0.76
0.95
1.14
Current Limit
0.50
0.550
0.80
1.00
1.20
0.525
0.578
0.84
1.05
1.26
A
100
85
75
0.22
177
145
125
15
µA
mΩ
Active High Enable (A): V
EN
= 0V,
V
IN
= 5V
Active Low Enable (B): V
EN
= V
IN
= 5V
Active High Enable (A): V
EN
= 1.5V,
V
IN
= 5V
Active Low Enable (B): V
EN
= 0V,
V
IN
= 5V
µA
100
300
Condition
Min.
2.5
2.0
1.9
2.25
2.15
100
Typ.
Max.
5.5
2.5
2.4
mV
Units
V
V
Power Supply Input
0.75
5
August 2012
4
M9999-082012-A
Micrel, Inc.
I
EN
Enable Input Current
0V
≤
V
EN
≤
5V
1
MIC2033
µA
Electrical Characteristics
(4)
(Continued)
Symbol
R
FAULT/
I
FAULT/_OFF
I
CSLEW
T
SD
T
SDHYS
t
RISE
t
FALL
t
ON_DLY
t
OFF_DLY
t
SC_RESP
t
FAULT/
Notes:
1.
2.
3.
4.
5.
6.
Exceeding the absolute maximum rating may damage the device.
Devices are ESD sensitive. Handling precautions recommended. Human body model (HBM), 1.5kΩ in series with 100pF.
The device is not guaranteed to function outside its operating rating.
Specification for packaged product only.
Preliminary.
See Timing Diagrams (Figures 1-3).
Parameter
FAULT/ Output Resistance
FAULT/ Off Current
CSLEW Input Current
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Output Turn-on Rise Time
(6)
Output Turn-off Fall Time
(6)
Output Turn-on Delay
(6)
Output Turn-off Delay
(6)
Short Circuit Response
Time
(6)
Over-current Fault Response
(6)
Delay Time
Condition
I
OUT
= 10mA
V
FAULT/
= V
IN
V
CSLEW
= V
IN
T
J
Rising
Min.
Typ.
Max.
25
10
Units
Ω
µA
µA
°C
°C
µs
µs
µs
µs
µs
0.6
157
15
Thermal Protection
Timing Specifications (AC Parameters)
R
LOAD
= 10Ω; C
OUT
= 1µF
V
EN
= OFF; R
LOAD
= 10Ω; C
OUT
= 1µF
R
LOAD
= 10Ω; C
OUT
= 1µF
R
LOAD
= 10Ω; C
OUT
= 1µF
V
OUT
= 0V (short circuit)
16
700
32
700
5
10
32
49
ms
August 2012
5
M9999-082012-A
嵌入式系统
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