MIC2007

MIC2007 MICREL | Alldatasheet

Document overview

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• PDF pages: 17

Technical content

Features

• 70m Ω typical on-resistance
• 2.5V – 5.5V operating range
• User adjustable current limit: 0.2A – 2.0A
• Kick start™
• User adjustable output slew rate control
• Automatic load discharge
• Thermal protection
• Under voltage lock-out
• Low quiescent current

Applications

• USB / IEEE 1394 power distribution
• Desktop and laptop PCs
• Set top boxes
• Game consoles
• PDAs
• Printers
• Do cking stations
• C hargers Typical Application VIN D+/D- D+/D- 5V Supply CSLEW VOUT GND ENABLE MIC2007 MIC2017 USB Controller ILIMIT VBUS USB Port USB Port

Figure 1. Typical Application Circuit

October 2005 2 M9999-102805 MIC2000 Family Members Part Number Pin Function Normal Limiting Kickstart I Limit I Adj. Enable CSLEW FAULT/ DLM* Load Discharge 2006 2016 Fixed -- ▲ ▲ -- ▲ -- 2009 2019 Adj. ▲ ▲ -- ▲ -- -- * Dynamic Load Management Adj = Adjustable current limit Fixed = Factory programmed current limit

Ordering Information

Part Number Marking(1) Current Limit Kickstart Pb-Free Package MIC2007YM6 FHAA SOT-23-6 MIC2007YML(2) HAA No 2mm X 2mm MLF MIC2017YM6 FQAA SOT-23-6 MIC2017YML(2) QAA 0.2A – 2.0A Yes Yes 2mm X 2mm MLF Notes: 1. Under-bar symbol ( _ ) may not be to scale. 2. Consult Factory for availability

October 2005 3 M9999-102805 Pin Configuration NODAP EDISKCAB DNUORGSI VOUT 1 CSLEW ILIMIT VIN GND ENABLE 6-Pin 2mm X 2mm MLF (ML) Top View ENABLE GND VOUT ILIMIT VIN

5 CSLEW

SOT 23-6 (M6) Top View Pin Description Pin Number SOT-23 Pin Number MLF Pin Name Type Description 1 6 VIN Input Supply input. This pin provides power to both the output switch and the MIC2007/2017’s internal control circuitry. 2 5 GND -- Ground. 3 4 ENABLE Input Output enable pin. A logic HIGH activates the output switch, applying power to the load attached to VOUT. 4 3 I LIMIT Input Sets the current limit threshold via a resistor connected between ILIMIT and GND. I LIMIT = Current Limiting Factor (CLF) / RSET. 5 2 CSLEW Input Slew rate control. Adding a small value capacitor between this pin and VIN slows turn-ON of the power FET. 6 1 VOUT Output Switch output. The load being driven by MIC2007/2017 is connected to this pin.

October 2005 4 M9999-102805 Absolute Maximum Ratings(1) Operating Ratings(2) Package Thermal Resistance (θJA) MLF 2x2 mm θJC

Electrical Characteristics

VIN = 5V, TAMBIENT = 25°C unless specified otherwise. Bold indicates –40°C to +85°C limits. Symbol Parameter Conditions Min Typ Max Units VIN Switch Input Voltage 2.5 5.5 V IIN Internal Supply Current Switch = OFF, ENABLE = 0V 1 5 µA IIN Internal Supply Current Switch = ON, IOUT = 0 ENABLE = 1.5V 80 330 µA ILEAK Output Leakage Current VIN = 5V, VOUT = 0 V, ENABLE = 0 1.2 10 µA 70 100 mΩ RDS(ON) Power Switch Resistance VIN = 5V, IOUT = 100 mA 125 mΩ RDSCHG Load Discharge Resistance VIN = 5V, ISINK = 5 mA 70 126 200 Ω IOUT = 2.0A, VOUT = 0.8VIN 210 250 286 V IOUT = 1.0A, VOUT = 0.8VIN 190 243 293 V IOUT = 0.5A, VOUT = 0.8VIN 168 235 298 V CLF Current Limit: Factor RSET (Ω) = CLF (V) IOUT (A) IOUT = 0.2A, VOUT = 0.8VIN 144 225 299 V ILIMIT_2nd Secondary current limit (Kickstart) MIC2017, VIN = 2.5V 2.2 4 6 A VIN rising 2.0 2.25 2.5 V UVLOTHRESHOLD Under Voltage Lock Out threshold VIN falling 1.9 2.15 2.4 V VIL(max.) 0.5 VEN ENABLE Input Voltage VIH(min.) 1.5 V IEN ENABLE Input Current VEN = 0V to 5.0V 1 5 µA TJ increasing 145 OTTHRESHOLD Over-temperature Threshold TJ decreasing 135

October 2005 5 M9999-102805 AC Characteristics Symbol Parameter Condition Min Typ Max Units tRISE Output turn-ON rise time RL = 10Ω, CLOAD = 1µF, VOUT = 10% to 90% 500 1000 1500 µs tD_LIMIT Delay before current limiting MIC2017 77 128 192 ms tRESET Delay before resetting Kickstart current limit delay, tD_LIMIT Out of current limit following a current limit event. MIC2017 77 128 192 ms tON_DLY Output Turn-on Delay RL = 43Ω, CL = 120µF, CSLEW ≤ 10pF, VEN = 50% to VOUT = 10% 1000 1500 µs tOFF_DLY Output Turn-off Delay RL = 43Ω, CL = 120µF, CSLEW ≤ 10pF, VEN = 50% to VOUT = 90% 700 µs ESD Symbol Parameter Condition Min Typ Max Units VOUT and GND ± 4 kV VESD_HB Electrostatic Discharge Voltage: Human Body Model All other pins ± 2 kV VESD_MCHN Electrostatic Discharge Voltage: Machine Model All pins Machine Model ± 200 V Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 4. Specification for packaged product only. 5. Requires proper thermal mounting to achieve this performance.

October 2005 6 M9999-102805 Timing Diagrams ENABLE VOUT 50% 90% 10% tON_DLY tOFF_DLY 50% Switching Delay Times 90% 10% 90% 10% tFALLtRISE Rise and Fall Times 90% 10% tRISE VOUT Output Rise Time

October 2005 7 M9999-102805 Typical Characteristics 100 23456 SUPPLY CURRENT (µA) VIN (V) Supply Current Output Enabled -40°C 85°C 25°C 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 234 5 6 7 SUPPLY CURRENT (µA) VIN (V) Supply Current Output Disabled -40°C 85°C 25°C 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 -50 -30 -10 103 05 07 09 0 (µA) TEMPERATURE (°C) Switch Leakage Current - OFF 2.05 2.1 2.15 2.2 2.25 2.3 -50 0 50 100 150 THRESHOLD (V) TEMPERATURE (°C) UVLO Threshold vs. Temperature V RISING V FALLING 100 2 2.5 33 .544 .5 55 .5 RON (mOhm) VIN (V) RON vs. Supply Voltage 100 120 -50 -30 -10 103 05 07 09 0 RON (mOhm) TEMPERATURE (°C) RON vs. Temperature 2.5V 3.3V 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Temperature @ 2.5V 85°C 25°C -40°C 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Temperature @ 3V 25°C 85°C -40°C 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Temperature @ 5V 85°C 25°C -40°C 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Input Voltage @ -40°C 2.5V Note: The 2.5V and 3V plots overlap. 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Input Voltage @ 25°C 2.5V 215 220 225 230 235 240 245 250 0 0.5 1.0 1.5 2.0 CURRENT LIMIT FACTOR CURRENT LIMIT (A) Current Limit Factor vs. Input Voltage @ 85°C 2.5V

October 2005 8 M9999-102805 Functional Characteristics ENABLE (2.5V/div) VOUT (1V/div) IOUT (200mA/div) Time (ms) 24 6 81 0 12 14 VIN = 5.0V RLOAD CLOAD = 100µF Turn-On/Turn-Off ENABLE (2.5V/div) VOUT (1V/div) IOUT (200mA/div) Time (ms) RL CSLEW = 0pF 48 12 16 20 24 28 32 36 40 Inrush Current Response MIC20xx-0.5 Inrush Current RInrush Current Res 0µF 10µF 22µF47µF 100µF 220µF 470µF ENABLE (2.5V/div) VOUT (1V/div) IOUT (250mA/div) Time (ms) 50 100 150 200 250 300 350 400 450 500 550 VIN = 5.0V RLOAD CLOAD = 47µF Current Limit Response Thermal Shutdown ENABLE (2.5V/div) VOUT (1V/div) IOUT (150mA/div) Time (µs) 2000 6000 10000 14000 18000 22000 VIN = 5.0V RLOAD CLOAD = 0µF 0pF 100pF 820pF 1800pF 2700pF 3500pF CSLEW Response ENABLE (2.5V/div) VOUT (1V/div) VIN (1/div) Time (µs) 4 8 12 16 20 24 28 32 36 40 44 48 UVLO Increasing Enable tied to VIN ENABLE (2.5V/div) VOUT (1V/div) VIN (1/div) Enable tied to VIN 4 8 12 16 20 24 28 32 36 40 44 48 UVLO Decreasing ponse Inrush Current Response Inrush Current Response

October 2005 9 M9999-102805 ENABLE (2.5V/div) VOUT (1V/div) IOUT (0.5A/div) Time (ms) 50 100 150 200 250 300 350 400 450 500 550 Kickstart Response Normal Load with Temporary High Load ENABLE (1V/div) VOUT (1V/div) IOUT (0.5A/div) Time (ms) 50 100 150 200 250 300 350 400 450 500 550 Kickstart Response No Load to Short Circuit ENABLE (2.5V/div) VOUT (1V/div) IOUT (0.5A/div) Time (ms) 50 100 150 200 250 300 350 400 450 500 550 Kickstart Response Normal Load with Temporary Short Circuit ENABLE (2.5V/div) VOUT (1V/div) IOUT (0.5A/div) Time (ms) 50 100 150 200 250 300 350 400 450 500 550 Kickstart Response Device Enabled into a Short Circuit

Figure 2. MIC2007/2017 Block Diagram

current will flow from VOUT to VIN. is ON any time the device is not Enabled. the appliance to stall or stutter. example of Kickstart operation is shown below. Figure 3. Kickstart Operation secondary current limit, whichever is less. heating (effect exaggerated for emphasis). F) Thermal shutdown followed by thermal cycling. G) Excessive lo ad rel eased, norm al loa d rem ains. MIC2017 drops out of current limiting.

October 2005 12 M9999-102805 Enable ENABLE is a HIGH true control signal, which activates the main MOSFET switch. ENABLE will operate with logic running from supply voltages as low as 1.8V, once VIN has exceeded the UVLO threshold. ENABLE can be wire-OR’d with other MIC2007/2017s or similar devices without damage to the device. ENABLE may be driven higher than V IN, but no higher than 5.5V. Slew Rate Control Large capacitive loads can create significant current surges when charged through a high-side switch such as the MIC2007/2017. For this reason, the MIC2007/2017 provides built-in slew rate control to limit the initial inrush currents upon enabling the power MOSFET switch. Slew rate control is active upon powering up, and upon re-enabling the load. At shutdown, the discharge slew rate is controlled by the external load and output capacitor. On MIC2007/2017 slew rate is adjustable and can be further reduced by adding an external capacitance between VIN and the CSLEW pins. Thermal Shutdown Thermal shutdown is employed to protect the MIC2007/2017 from damage should the die temperature exceed safe operating levels. Thermal shutdown shuts off the output MOSFET if the die temperature reaches 145°C. The MIC2007/2017 will automatically resume operation when the die temperature cools down to 135°C. If resumed operation results in reheating of the die, then another shutdown cycl e will occur and the MIC2007/2017 will continue cycling between ON and OFF states until the offending load has been removed. Depending upon PCB layout, package type, ambient temperature, etc., hundreds of milliseconds may elapse from the incidence of a fault to the output MOSFET being shut off. This delay is due to thermal time constants within the system itself. In no event will the device be damaged due to thermal overload because die temperature is monitored continuously by on-chip circuitry.

October 2005 13 M9999-102805

Application Information

The MIC2007/2017’s current limit is user programmable and controlled by a resistor connected between the I LIMIT pin and Ground. The value of this resistor is determined by the following equation: ILIMIT = Current Limit Factor (CLF) RSET or RSET (Ω) = Current Limit Factor (V) ILIMIT (A) Example: Set I LIMIT = 1.25A Looking in the Electrical spec ifications we will find CLF at ILIMIT = 1A. For the sake of th is example, we will say the typical value of CLF at an I OUT of 1A is 235V. Applying the equation above: RSET (Ω) = 235 V 1.25 A RSET = 188 Ω Designers should be aware t hat variations in the measured I LIMIT for a given R SET resistor, will occur because of small differences between individual ICs (inherent in silicon processing) resulting in a spread of ILIMIT values. In the example above we used the typical value of CLF to calculate RSET. We can determine ILIMIT’s spread by using the minimum and maximum values of CLF and the calculated value of RSET. RSET = 187 Ω (the closest standard 1% value) ILIMIT_MIN = 210V = 1.12A 187Ω ILIMIT_MIN = 260V = 1.39A 187Ω Giving us a maximum ILIMIT variation over temperature of: I LIMIT_MIN ILIMIT_TYP I LIMIT_MAX 1.12A 1.25A 1.39A or 1.25A ±11% ILIMIT vs. IOUT measured The MIC2007/2017’s current limiting circuitry 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 f ault current on the system’s power supply and to limit internal heating of the MIC2007/2017. When measuring IOUT it is important to bear this voltage dependence in mind. Otherwise, the measurement data may appear to indicate a problem when none really exists. This voltage dependence is illustrated in Figures 4 and 5. In Figure 4, output current is measured as VOUT is pulled below V IN, with the test terminating when V OUT is 1V below V IN. Observe that once I LIMIT is reached I OUT remains constant throughout the remainder of the test. In Figure 5, this test is repeated but with V IN - V OUT exceeding 1V. When V IN - V OUT > 1V, the MIC2007/2017’s current limiting circuitry responds by decreasing I OUT, as can be seen in Figure 5. In this demonstration, V OUT is being controlled and I OUT is the measured quantity. In real life applications, V OUT is determined in accordance with Ohm’s law by the load and the limiting current.

cool the device and thermal limiting will be invoked. continuous currents of 1A or more. Figure 10. Die Temperature vs. Package

2 Vias

Figure 11. Pad for Thermal Mounting to PCB

Package Information

6-Pin SOT-23 (M6) 6-Pin 2mm X 2mm MLF (ML) October 2005 17 M9999-102805 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 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. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support app liances, 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. © 2005 Micrel, Incorporated.