MIC2042-2BTS Micrel Inc, MIC2042-2BTS Datasheet

MIC2042-2BTS
Manufacturer Part Number	MIC2042-2BTS
Description	IC DISTRIBUTION SW SGL 14-TSSOP
Manufacturer	Micrel Inc
Type	High Side Switch
MIC2042-2BTS datasheets	1. MIC2042-1YM.pdf (15 pages)

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Specifications of MIC2042-2BTS
Number Of Outputs	1	Rds (on)	60 mOhm
Internal Switch(s)	Yes	Current Limit	Adjustable
Voltage - Input	0.8 ~ 5.5 V	Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount	Package / Case	14-TSSOP
Short Circuit Current Limit	0.5 to 3A	Input Voltage Range	0.8 to 5.5V
Number Of Switches	Single	Operating Temp Range	-40C to 85C
Operating Temperature Classification	Industrial	Mounting	Surface Mount
Pin Count	14	Package Type	TSSOP
Lead Free Status / RoHS Status	Contains lead / RoHS non-compliant

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MIC2042/2043

General Description

The MIC2042 and MIC2043 are high-side MOSFET switches

optimized for general purpose power distribution applications

which require circuit protection. The devices switch up to 5.5V

and as low as 0.8V while offering both programmable current

limiting and thermal shutdown to protect the device and the

load. A fault status output is provided in order to detect

overcurrent and thermal shutdown fault conditions. Both

devices employ soft-start circuitry to minimize the inrush

current in applications that employ highly capacitive loads.

Additionally, for tighter control over inrush current during

start-up, the output slew-rate may be adjusted by an external

capacitor.

The MIC2043 features a auto-reset circuit breaker mode that

latches the output off upon detecting an overcurrent condition

lasting more than 28ms. The output is reset by removing or

reducing the load.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Application

+3.3V

Power

Supply

OUT1

OUT2

4.7µF

ON/OFF

Logic

Controller

OVERCURRENT

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

January 2005

Single Channel, High Current, Low Voltage,

Protected Power Distribution Switch

Features

• 60mΩ max. on-resistance

• 0.8V to 5.5V operating range

• Adjustable current limit

• Power-Good detection

• Up to 3A continuous output current

• Short-circuit protection with thermal shutdown

• Adjustable slew-rate control

• Circuit breaker mode (MIC2043)

• Fault status flag

• Undervoltage lockout

• Output MOSFET reverse current flow block when

disabled

• Very fast reaction to short-circuits

• Low quiescent current

Applications

• Docking stations

• Notebook PCs

• PDAs

• Hot swap board insertions

• RAID controllers

• USB hosts

• ACPI power distribution

MIC2042-1BTS

0.1µF

10,11,14

VBIAS

VOUT

0.1µF

8, 12

VIN

PGREF

20kΩ

/FAULT

SLEW

PWRGD

ILIM

UVLOIN

C4*

0.022µF

GND

SET

200Ω

MIC2042/2043

OUT

3.3V@ 1.5A

294kΩ

LOAD

33µF

24.3kΩ

MIC39100-2.5BS

2.5V

OUT

GND

(OPEN)

Note:

All V

pins (8, 12) must be externally tied together.

All V

pins (10, 11, 14) must be externally tied together.

OUT

≅ 2A.

LIMIT

Output Power-Good = 3.0V.

*C4 is optional. See "Applications Information."

M0512-112603

Micrel

Download datasheet (827Kb)

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MIC2042-2BTS Summary of contents
Page 1 ... MIC2042/2043 General Description The MIC2042 and MIC2043 are high-side MOSFET switches optimized for general purpose power distribution applications which require circuit protection. The devices switch up to 5.5V and as low as 0.8V while offering both programmable current limiting and thermal shutdown to protect the device and the load ... Page 2 ... MIC2042/2043 Ordering Information Part Number Standard Pb-Free MIC2042-1BM MIC2042-1YM MIC2042-2BM MIC2042-2YM MIC2043-1BM MIC2043-1YM MIC2043-2BM MIC2043-2YM MIC2042-1BTS MIC2042-1YTS MIC2042-2BTS MIC2042-2YTS MIC2043-1BTS MIC2043-1YTS MIC2043-2BTS MIC2043-2YTS Pin Configuration EN 1 /FAULT 2 GND 3 ILIM 4 8-Pin SOP (M) M0512-112603 Enable Circuit Breaker V BIAS Active High Active Low Active High ... Page 3 ... Slew-Rate Adjustment” for further detail. ILIM Current Limit Set: A resistor, R limit threshold as CLF/R the “Electrical Characteristics” table. For the MIC2042/43, the continuous output current range is 0.5A to 3A. VIN Switch Input Supply: The drain of the output MOSFET. The range of input for the switch is 0 ... Page 4 ... MIC2042/2043 Absolute Maximum Ratings Supply Voltage V and V BIAS ............................................................................. IN /FAULT, PWRGD Output Voltage ................................... 6V /FAULT, PWRGD Output Current .............................. 25mA Junction Temperature (T ) ...................... Internally Limited J (3) ESD Rating Human Body Model ................................................... 3kV Machine Model ........................................................ 200V Electrical Characteristics 5V 25°C unless specified otherwise. Bold indicates –40°C to +85°C. ... Page 5 ... BIAS R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD > 4.0V for MIC2042/MIC2043- CLF/R . LIM SET 50 10% (a) MIC2042/43-1 50 10% (b) MIC2042/43-2 Figure 1. Turn-On/Turn-Off Delay Increase the load 0. LIMIT 5 Min Typ ... Page 6 ... MIC2042/2043 Test Circuit m M0512-112603 m MIC2042/43-xBTS January 2005 Micrel ... Page 7 ... MIC2042/2043 Typical Characteristics Supply Current vs. Temperature 500 450 400 5.5V 350 IN BIAS 300 250 IN BIAS 1.6V IN BIAS 200 150 100 -40 - 100 TEMPERATURE (°C) Output Leakage Current vs. Temperature 600 V = 5.5V BIAS 500 400 BIAS 300 200 100 V = 1.6V BIAS 0 -40 - 100 TEMPERATURE (°C) UVLO Adjust PinThreshold vs ... Page 8 ... MIC2042/2043 Functional Characteristics 5V Turn-On V TIME (1ms/div.) Latched Output (MIC2043 LOAD C LOAD TIME (5ms/div.) Current Limit Response TIME (5ms/div.) M0512-112603 = BIAS R = 2.8 m LOAD LOAD = LOAD LOAD 8 5V Turn-Off LOAD LOAD m TIME (250 s/div.) Latched Output Reset (MIC2043) 4.84V V = 5.0V ... Page 9 ... MIC2042/2043 Output Slew Response TIME (2.5ms/div.) January 2005 2.8 LOAD LOAD 0.033 F SLEW 9 Thermal Shutdown Response LOAD LOAD TIME (100ms/div.) M0512-112603 Micrel ... Page 10 ... MIC2042/2043 Functional Diagram M0512-112603 + + MIC2042/43 Block Diagram 10 Micrel + + January 2005 ... Page 11 ... The limiting current value is defined by the current limit factor (CLF) divided by R and the MIC2042/43 will limit from 0. with a set point accuracy of ±22%. In programming the nominal current limit, the value of R ... Page 12 ... MIC2042 automatically resets its output and resumes supply- ing current to the load when the die temperature drops to 120°C. If the fault is still present, the MIC2042 will quickly re- heat and shut down again. This process of turning ON-OFF-ON is called thermal cycling and will continue as long as the power switch is enabled while the fault or excessive load is present ... Page 13 ... VOUT pin of the MIC2042. For applica- tions that use more than a foot of cable, an additional 10µF/ft. is recommended. Reverse Current Block ... Page 14 ... W W Figure 4. Lower UVLO Setting heat up considerably. The following list contains some useful suggestions for PCB layout design of the MIC2042/43 in order to prevent the die from overheating under normal operating conditions: 1. Supply additional copper area under the device (5) 2. Provide additional pad area on the corner pins of (6) 3 ... Page 15 ... MIC2042/2043 Package Information 0.026 (0.65) 0.157 (3.99) 0.150 (3.81) 0.064 (1.63) 0.045 (1.14) 0.65 BSC (0.026) MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. ...

MIC2042-2BTS Summary of contents

Page 1
... MIC2042/2043 General Description The MIC2042 and MIC2043 are high-side MOSFET switches optimized for general purpose power distribution applications which require circuit protection. The devices switch up to 5.5V and as low as 0.8V while offering both programmable current limiting and thermal shutdown to protect the device and the load ...
Page 2
... MIC2042/2043 Ordering Information Part Number Standard Pb-Free MIC2042-1BM MIC2042-1YM MIC2042-2BM MIC2042-2YM MIC2043-1BM MIC2043-1YM MIC2043-2BM MIC2043-2YM MIC2042-1BTS MIC2042-1YTS MIC2042-2BTS MIC2042-2YTS MIC2043-1BTS MIC2043-1YTS MIC2043-2BTS MIC2043-2YTS Pin Configuration EN 1 /FAULT 2 GND 3 ILIM 4 8-Pin SOP (M) M0512-112603 Enable Circuit Breaker V BIAS Active High Active Low Active High ...
Page 3
... Slew-Rate Adjustment” for further detail. ILIM Current Limit Set: A resistor, R limit threshold as CLF/R the “Electrical Characteristics” table. For the MIC2042/43, the continuous output current range is 0.5A to 3A. VIN Switch Input Supply: The drain of the output MOSFET. The range of input for the switch is 0 ...
Page 4
... MIC2042/2043 Absolute Maximum Ratings Supply Voltage V and V BIAS ............................................................................. IN /FAULT, PWRGD Output Voltage ................................... 6V /FAULT, PWRGD Output Current .............................. 25mA Junction Temperature (T ) ...................... Internally Limited J (3) ESD Rating Human Body Model ................................................... 3kV Machine Model ........................................................ 200V Electrical Characteristics 5V 25°C unless specified otherwise. Bold indicates –40°C to +85°C. ...
Page 5
... BIAS R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD > 4.0V for MIC2042/MIC2043- CLF/R . LIM SET 50 10% (a) MIC2042/43-1 50 10% (b) MIC2042/43-2 Figure 1. Turn-On/Turn-Off Delay Increase the load 0. LIMIT 5 Min Typ ...
Page 6
... MIC2042/2043 Test Circuit m M0512-112603 m MIC2042/43-xBTS January 2005 Micrel ...
Page 7
... MIC2042/2043 Typical Characteristics Supply Current vs. Temperature 500 450 400 5.5V 350 IN BIAS 300 250 IN BIAS 1.6V IN BIAS 200 150 100 -40 - 100 TEMPERATURE (°C) Output Leakage Current vs. Temperature 600 V = 5.5V BIAS 500 400 BIAS 300 200 100 V = 1.6V BIAS 0 -40 - 100 TEMPERATURE (°C) UVLO Adjust PinThreshold vs ...
Page 8
... MIC2042/2043 Functional Characteristics 5V Turn-On V TIME (1ms/div.) Latched Output (MIC2043 LOAD C LOAD TIME (5ms/div.) Current Limit Response TIME (5ms/div.) M0512-112603 = BIAS R = 2.8 m LOAD LOAD = LOAD LOAD 8 5V Turn-Off LOAD LOAD m TIME (250 s/div.) Latched Output Reset (MIC2043) 4.84V V = 5.0V ...
Page 9
... MIC2042/2043 Output Slew Response TIME (2.5ms/div.) January 2005 2.8 LOAD LOAD 0.033 F SLEW 9 Thermal Shutdown Response LOAD LOAD TIME (100ms/div.) M0512-112603 Micrel ...
Page 10
... MIC2042/2043 Functional Diagram M0512-112603 + + MIC2042/43 Block Diagram 10 Micrel + + January 2005 ...
Page 11
... The limiting current value is defined by the current limit factor (CLF) divided by R and the MIC2042/43 will limit from 0. with a set point accuracy of ±22%. In programming the nominal current limit, the value of R ...
Page 12
... MIC2042 automatically resets its output and resumes supply- ing current to the load when the die temperature drops to 120°C. If the fault is still present, the MIC2042 will quickly re- heat and shut down again. This process of turning ON-OFF-ON is called thermal cycling and will continue as long as the power switch is enabled while the fault or excessive load is present ...
Page 13
... VOUT pin of the MIC2042. For applica- tions that use more than a foot of cable, an additional 10µF/ft. is recommended. Reverse Current Block ...
Page 14
... W W Figure 4. Lower UVLO Setting heat up considerably. The following list contains some useful suggestions for PCB layout design of the MIC2042/43 in order to prevent the die from overheating under normal operating conditions: 1. Supply additional copper area under the device (5) 2. Provide additional pad area on the corner pins of (6) 3 ...
Page 15
... MIC2042/2043 Package Information 0.026 (0.65) 0.157 (3.99) 0.150 (3.81) 0.064 (1.63) 0.045 (1.14) 0.65 BSC (0.026) MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. ...

MIC2042-2BTS

MIC2042-2BTS

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Specifications of MIC2042-2BTS

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MIC2042-2BTS Summary of contents

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