Datasheet

ManualsBrandsMicrochip ManualsAnalogue SwitchesCurrent Limit High Side Switch

MIC20XX Family

Fixed and Adjustable Current Limiting

Power Distribution Switches

Kickstart is a trademark of Micrel, Inc.

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

CableCARD is a trademark of CableLabs.

Protected by U.S. Patent No. 7,170,732

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

MIC20XX family of switches are current limiting, high-side

power switches, designed for general purpose power

distribution and control in digital televisions (DTV), printers,

set top boxes (STB), PCs, PDAs, and other peripheral

devices (see Functionality Table and Pin Configuration

drawings)

MIC20XX family’s primary functions are current limiting

and power switching. They are thermally protected and will

shutdown should their internal temperature reach unsafe

levels, protecting both the device and the load, under high-

current or fault conditions

Features include fault reporting, fault blanking to eliminate

noise-induced false alarms, output slew rate limiting, under

voltage detection, automatic-on output, and enable pin

with choice of either active low or active high enable. The

FET is self-contained, with a fixed- or user-adjustable

current limit. The MIC20XX family is ideal for any system

where current limiting and power control are desired.

The MIC201X (3  x  9) and MIC2019A switches offer a

unique new patented feature: Kickstart™, which allows

momentary high-current surges up to the secondary

current limit (I

LIMIT

_2nd) without sacrificing overall system

safety.

The MIC20xx family is offered, depending on the desired

features, in a space-saving 5-pin SOT-23, 6-pin SOT-23,

and 2mm x 2mm MLF

packages.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com

Features

• MIC20X3 – MIC20X9

70mΩ typical on-resistance @ 5V

• MIC2005A/20X9A

170mΩ typical on-resistance @ 5V

• Enable active high or active low

• 2.5V – 5.5V operating range

• Pre-set current limit values of 0.5A, 0.8A, and 1.2A*

• Adjustable current limit 0.2A to 2.0A* (MIC20X7-

MIC20X9)

• Adjustable current limit 0.1A to 0.9A* (MIC20X9A)

• Undervoltage lock-out (UVLO)

• Variable UVLO allows adjustable UVLO thresholds*

• Automatic load discharge for capacitive loads*

• Soft-start prevents large current inrush

• Adjustable slew rate allows custom slew rates*

• Automatic-on output after fault

• Thermal protection

* Available on some family members

Applications

• Digital televisions (DTV)

• Set top boxes

• PDAs

• Printers

• USB / IEEE 1394 power distribution

• Desktop and laptop PCs

• Game consoles

• Docking stations

___________________________________________________________________________________________________________

Typical Application

VIN VOUT

MIC2005A

BUS

USB

Port

GND

EN FAULT/

5V Supply

VIN

Logic

Controller

ON/OFF

OVERCURRENT/

1µF

120µF

Figure 1. Typical Application Circuit

August 2011

M9999-080211-D

Summary of content (30 pages)

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MIC20XX Family Fixed and Adjustable Current Limiting Power Distribution Switches General Description Features MIC20XX family of switches are current limiting, high-side power switches, designed for general purpose power distribution and control in digital televisions (DTV), printers, set top boxes (STB), PCs, PDAs, and other peripheral devices (see Functionality Table and Pin Configuration drawings) MIC20XX family’s primary functions are current limiting and power switching.
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Micrel, Inc. MIC20xx Family Ordering Information MIC2003/2013 Part Number(1) Marking(2) Current Limit MIC2003-0.5YM5 FD05 0.5A MIC2003-0.8YM5 FD08 0.8A MIC2003-1.2YM5 FD12 1.2A MIC2003-0.5YML D05 0.5A MIC2003-0.8YML D08 0.8A MIC2003-1.2YML 1.2A MIC2013-0.5YM5 D12 FL05 MIC2013-0.8YM5 FL08 0.8A MIC2013-1.2YM5 Kickstart™ Package 5-Pin SOT-23 No 6-Pin 2mm x 2mm MLF® 0.5A FL12 1.2A MIC2013-0.5YML L05 0.5A MIC2013-0.8YML L09 0.8A MIC2013-1.2YML L12 1.
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Micrel, Inc. MIC20xx Family Ordering Information (Continued) MIC2005 Part Number(1) Marking(2) Current Limit Enable MIC2005-0.5YM6 FF05 0.5A Active High MIC2005-0.8YM6 FF08 0.8A Active High MIC2005-1.2YM6 FF12 1.2A Active High MIC2005-0.5YML F05 0.5A Active High MIC2005-0.8YML F08 0.8A Active High MIC2005-1.2YML F12 1.2A Active High Kickstart™ Package 6-Pin SOT-23 No 6-Pin 2mm x 2mm MLF® MIC2005L Part Number(1) Marking(2) Current Limit MIC2005-0.5LYM5 5LFF 0.
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Micrel, Inc. MIC20xx Family Ordering Information (Continued) MIC2006/2016 Part Number(1) Marking(2) Current Limit MIC2006-0.5YM6 FG05 0.5A MIC2006-0.8YM6 FG08 0.8A MIC2006-1.2YM6 FG12 1.2A MIC2006-0.5YML G05 0.5A MIC2006-0.8YML G08 0.8A MIC2006-1.2YML G12 1.2A MIC2016-0.5YM6 FP05 0.5A MIC2016-0.8YM6 FP08 0.8A MIC2016-1.2YM6 FP12 1.2A MIC2016-0.5YML P05 0.5A MIC2016-0.8YML P09 0.8A MIC2016-1.2YML P12 1.
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Micrel, Inc. MIC20xx Family Ordering Information (Continued) MIC2009A/2019A Part Number(1) Marking(2) MIC2009A-1YM6 FK1 MIC2009A-2YM6 FK2 MIC2019A-1YM6 FS1 MIC2019A-2YM6 FS2 Current Limit Kickstart™ Enable Package Active High No Active Low 0.1 A – 0.9 A Active High Yes 6-pin SOT-23 Active Low Notes: 1. All MIC20XX Family parts are RoHS-compliant lead free. 2. Over/Under-bar symbol ( ¯ / _ ) may not be to scale.
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Micrel, Inc.
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Micrel, Inc. MIC20xx Family MIC20XX Family Member Pin Configuration Drawings Fixed Current Limit MIC20X3 VIN 1 5 VOUT GND 2 NC 3 4 NC 6-Pin MLF® (ML) (Top View) 5-Pin SOT-23 (M5) MIC20X4 VIN 1 5 VOUT GND 2 ENABLE 3 4 NC 6-Pin MLF® (ML) (Top View) 5-Pin SOT-23 (M5) MIC20X5 VIN 1 VIN 1 5 VOUT GND 2 ENABLE 3 4 FAULT/ 5-Pin SOT-23 (M5) MIC2005-X.
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Micrel, Inc.
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Micrel, Inc. MIC20xx Family Descriptions These pin and signal descriptions aid in the differentiation of a pin from electrical signals and components connected to that pin. For example, VOUT is the switch’s output pin, while VOUT is the electrical signal output voltage present at the VOUT pin. Pin Descriptions Pin Name Type Description VIN Input Supply input. This pin provides power to both the output switch and the switch’s internal control circuitry. GND ─ EN Input Ground.
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Micrel, Inc. MIC20xx Family Absolute Maximum Ratings(1) Operating Ratings(2) VIN, VOUT .....................................................–0.3V to 6V All other pins ...........................................–0.3V to 5.5V Power Dissipation (PD) ..................... Internally Limited Continuous Output Current All except MIC2005A / MIC20X9A................. 2.25A MIC2005A / 20X9A .......................................... 1.0A Maximum Junction Temperature (TJ) ................
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Micrel, Inc. MIC20xx Family Electrical Characteristics(4) (Continued) VIN = 5V, TA = 25°C unless otherwise specified. Bold indicates –40°C to +85°C limits; CIN = 1µF. Symbol Parameter Condition Min. Typ. Max. Switch = ON Active Low Enable, VEN = 0V Active High Enable, VEN = 1.5V 80 330 Switch = OFF Active Low Enable, VEN = 1.5V 8 15 Switch = OFF Active High Enable, VEN = 0V 1 5 70 100 Units MIC2003-MIC2009, MIC2013-MIC2019, MIC2005-X.
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Micrel, Inc. MIC20xx Family Electrical Characteristics(4) (Continued) VIN = 5V, TA = 25°C unless otherwise specified. Bold indicates –40°C to +85°C limits; CIN = 1µF. Symbol Parameter Condition Min. Typ. Max. Units All Parts VIL (MAX) 0.5 VEN ENABLE Input Voltage(6) IEN ENABLE Input Current 0V ≤ VEN ≤ 5V UVLOTHRESHOLD Undervoltage Lock-Out Threshold VIN Rising VIN Falling UVLOHYSTERESIS Undervoltage Lock-Out Hysteresis VFAULT Fault Status Output Voltage IOL = 10mA 0.
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Micrel, Inc. MIC20xx Family AC Electrical Characteristics Symbol Parameter Condition Min. Typ. Max.
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Micrel, Inc.
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Micrel, Inc. MIC20xx Family Typical Characteristics Supply Current Output Disabled (MIC20XX) SUPPLY CURRENT (µA) 80 85°C 60 40 25°C -40°C 20 0 2.5 3.0 3.5 4.0 4.5 VIN (V) 5.0 0.10 0.10 0.09 0.09 0.08 0.07 0.06 0.05 0.04 0.03 85°C 0.02 -40°C 25°C 0.01 0 2.5 5.5 3.0 0.05 0.04 0.03 0.02 5V 0.01 0 -40 5.5 -15 10 35 60 TEMPERATURE (°C) 0.7 0.6 0.5 1.2 1.1 1.0 1.70 1.60 1.50 0.9 0.8 0.7 0.6 0.5 -40 85 R (MIC20XX) 160 140 120 25°C 100 85°C 80 60 -40°C 40 2.
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Micrel, Inc. MIC20xx Family Typical Characteristics (Continued) 85°C 40 30 20 10 0 2.5 3 3.5 4 4.5 VIN (V) 5 0.06 0.05 0.04 0.03 0.02 0.01 -40°C 0 2.5 5.5 3 (MIC20X5A) ILIMIT (A) ILIMIT (A) DS(ON) 85 R IN RDS(ON) (mOhms) 85°C 150 -40°C 50 0 2.5 3 V 3.5 4 4.5 VIN (V) 5 2.5V 5.5 vs. Temperature (MIC20XXA) V IN 120 25°C 100 85°C 80 60 -40°C 40 20 0 0 August 2011 0.2 0.3 0.4 IOUT (A) 0.5 0 0 0.6 0.4 0.6 ILIMIT (A) 0.8 1 40 3.3V 35 5.0V 30 25 3.3V 2.
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Micrel, Inc.
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Micrel, Inc.
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Micrel, Inc.
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Micrel, Inc. MIC20xx Family Functional Diagram Figure 2.
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Micrel, Inc. MIC20xx Family During this delay period, typically 128ms, a secondary current limit is in effect. If the load demands a current in excess the secondary limit, MIC201X acts immediately to restrict output current to the secondary limit for the duration of the Kickstart™ period. After this time the MIC201X reverts to its normal current limit. An example of Kickstart™ operation is shown in Figure 3.
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Micrel, Inc. MIC20xx Family MIC201X’s FAULT/ asserts at the end of the Kickstart™ period which is 128ms typical. This masks initial current surges, such as would be seen by a motor load starting up. If the load current remains above the current limit threshold after the Kickstart™ has timed out, then the FAULT/ will be asserted. After a fault clears, FAULT/ remains asserted for the delay of 128ms.
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Micrel, Inc. MIC20xx Family Giving us a maximum ILIMIT variation over temperature of: Application Information Setting ILIMIT The MIC2009/2019’s current limit is user programmable and controlled by a resistor connected between the ILIMIT pin and GND. The value of this resistor is determined by the following equation: ILIMIT = IOUT RSET ILIMIT_MIN ILIMIT_MAX CurrentLim itFactor(CLF) R SET 1928Ω 0.063A 0.136A 0.2A 993Ω 0.137A 0.265A 0.3A 673Ω 0.216A 0.
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Micrel, Inc. MIC20xx Family ILIMIT vs. IOUT Measured The MIC20XX’s current-limiting circuitry, during current limiting, is designed to act as a constant current source to the load. As the load tries to pull more than the allotted current, VOUT drops and the input to output voltage differential increases. When VIN - VOUT exceeds 1V, IOUT drops below ILIMIT to reduce the drain of fault current on the system’s power supply and to limit internal heating of the switch.
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MIC20xx Family NORMALIZED OUTPUT CURRENT (A) Micrel, Inc. Normalized Output Current vs. Output Voltage (2.5V) CSLEW’s Effect on ILIMIT An unavoidable consequence of adding CSLEW capacitance is a reduction in the MIC20X5 – 20X8’s ability to quickly limit current transients or surges. A sufficiently large capacitance can prevent both the primary and secondary current limits from acting in time to prevent damage to the MIC20X5 – 20X8 or the system from a short circuit fault.
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Micrel, Inc. MIC20xx Family To prevent false triggering of the VUVLO feature, the MIC20X6 includes a delay timer to blank out momentary excursions below the VUVLO trip point. If VIN stays below the VUVLO trip point for longer than 32ms (typical), then the load is disengaged and the MIC20X6 will wait 128ms before reapplying power to the load. If VIN remains below the VUVLO trip point, then the load will be powered for the 32ms blanking period and then again disengaged.
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Micrel, Inc. MIC20xx Family The VUVLO comparator uses no hysteresis. This is because the VUVLO blanking timer prevents any chattering that might otherwise occur if VIN varies about the trigger point. The timer is reset by upward crossings of the trip point such that VIN must remain below the trip point for the full 32ms period for load disengagement to occur. In selecting a VTRIP voltage, the designer is cautioned to not make this value less than 2.5V. A minimum of 2.
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Micrel, Inc. MIC20xx Family In Figure 12, die temperature is plotted against IOUT assuming a constant case temperature of 85°C. The plots also assume a worst case RON of 140mΩ at a die temperature of 135°C. Under these conditions it is clear that an SOT-23 packaged device will be on the verge of thermal shutdown, typically 140°C die temperature, when operating at a load current of 1.25A.
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Micrel, Inc.
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Micrel, Inc. MIC20xx Family Package Information (Continued) 6 Pin 2mm x 2mm MLF® (ML) Section 1.01 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 makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use.