MIC2514 IttyBitty® Integrated High-Side Switch General Description Features The MIC2514 is an integrated high-side power switch that consists of a TTL compatible input and protected Pchannel MOSFET. The MIC2514 can be used instead of a separate high-side driver and MOSFET in many lowvoltage applications. The MIC2514 switches voltage ranging from 3V to 13.5V and delivers more than 400mA continuous current. A slow turn-on feature prevents high inrush current when switching capacitive loads. The internal control circuitry is powered from the unswitched 3V to 13.5V input. Current limiting is internally fixed at approximately 1.9A and requires no external components. Thermal shutdown turns off the output if the die temperature exceeds approximately 170°C. The MIC2514 is available in the 5-pin SOT-23-5 package with a temperature range of –40°C to +85°C. Datasheets and support documentation can be found on Micrel’s web site at:www.micrel.com. • MOSFET on-resistance – 1.5Ω typical at 5V – 0.95Ω typical at 12V • 3V to 13.5V input • 25µA typical on-state supply current at 5V • <1µA typical off-state supply current at 5V • Current limit • Thermal shutdown • Slow turn-on Typical Application 1 Applications • 3.3V to 13.5V power management Ordering Information Part Number Standard Pb-Free MIC2514BM5 MIC2514YM5 Temp. Range Package –40° to +85°C 5-Pin SOT-23 Pin Configuration IN GND CTL 3 3 4 2 1 Part Identification F10 High-Side Power Switch 4 5 OUT NC 5-Pin SOT-23 (M5) IttyBitty is a registered trademark of Micrel, Inc. 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 2008 1 M9999-082808-C MIC2514 Micrel, Inc. Pin Description Pin Number Pin Name 1 CTL Control (Input): Non-inverting TTL compatible control input. High = on, low = off. Pin Function 2 GND Ground 3 IN 4 OUT 5 NC Supply Input: Output MOSFET source. Also supplies IC’s internal circuitry. Connect to supply. Switch Output: Output MOSFET drain. Connect to switched side of load. Not internally connected. Connect to ground plane for lowest package thermal resistance. Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .....................................................+20V Output Current (IOUT). ................................Internally Limited Control Input (VCTL) ......................................... –0.3V to 15V Storage Temperature (TS).........................–65°C to +150°C Supply voltage (VIN) ...................................... +3V to +13.5V Ambient Temperature (TA) .......................... –40°C to +85°C Junction Thermal Resistance (θJA) .................................................................220°C/W (θJC) .................................................................130°C/W Control Input (VCTRL)...........................................-0.3V to VIN Electrical Characteristics VIN = 5V; TA = 25°C, except bold values indicate –40°C< TA < +85°C, Note 3; unless noted. Parameter Condition Supply Current Control Input Voltage Output MOSFET Resistance Current Limit Threshold Min Typ Max Units VCTL = logic 0, VIN = 5V VCTL = logic 0, VIN = 13.5V 0.6 2.0 10 25 µA µA VCTL = logic 1, VIN = 3V VCTL = logic 1, VIN = 5V VCTL = logic 1, VIN = 13.5V 10 25 95 20 40 200 µA µA µA 0.79 V 1.45 1.65 2.0 2.3 V V VIN = 3V 2.4 4.5 Ω VIN = 5V 1.5 2.4 2.7 Ω VIN = 12V 0.95 1.5 1.7 Ω Ω 0.5 1.4 1.9 1.5 2.0 2.5 A A A VCTL = logic 0, 3V ≤ VIN ≤ 13.5V 0 VCTL = logic 1, 3V ≤ VIN ≤ 5V VCTL = logic 1, 5V ≤ VIN ≤ 13.5V 0.8 0.8 VIN = 3V VIN = 5V VIN = 12V 1.0 1.2 General Note: Devices are ESD sensitive. Handling precautions recommended Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices production tested at 25°C, but Devices guaranteed over indicated temperature range. August 2008 2 M9999-082808-C MIC2514 Micrel, Inc. Typical Characteristics On-Resistance vs. Supply Voltage 3 ON-RESISTANCE ( ) VCTL = 5V TA = 25°C 2 1 0 0 SUPPLY CURRENT (µA) 200 5 10 15 SUPPLY VOLTAGE (V) On-State SupplyCurrent vs. Temperature 150 100 50 V = 13.5V IN VIN = 5V 0 -60 -30 0 30 60 90 120 150 TEMPERATURE °C) ( THRESHOLD (V) 2.0 Control Input Threshold vs. Temperature VCTL = VS = 13.5V VCTL = VS = 13.5V 1.5 1.0 VCTL = VIN = 5V VCTL = VIN = 5V 0.5 100 TURN-ON DELAY TIME (µs) 2.5 0 -60 -30 0 30 60 90 120 150 TEMPERATURE °C) ( IL = 5mA, TA = 25°C VIN = 5V 10 VIN = 13.5V 1 0.1 80 RISE TIME (µs) Turn-On Delay Time vs. Load Capacitance 1 10 100 1000 LOAD CAPACITANCE (nF) Rise Time vs. Load Current 60 VIN = 5V TA = 25°C 40 20 VIN = 13.5V 0 August 2008 3 0 0.4 0.8 1.2 LOAD CURRENT (A) 1.6 M9999-082808-C MIC2514 Micrel, Inc. Typical Characteristics (continued) 10 Fall Time vs. Load Capacitance FALL TIME (ms) IL = 5mA, TA = 25°C 1 0.1 0.01 0.001 0.1 August 2008 VIN = 13.5V VIN = 5V 1 10 100 1000 LOAD CAPACITANCE (nF) 4 M9999-082808-C MIC2514 Micrel, Inc. Functional Diagram The output MOSFET has an intrinsic body diode which will conduct if OUT is forced to a higher voltage than IN. Functional Description The MIC2514 is a non-inverting high-side switch. A logic-high control input turns on the output transistor, and a logic-low turns off the output transistor. Fault conditions turn off the output transistor. Thermal Shutdown Thermal shutdown turns off the output MOSFET if the die temperature exceeds approximately 170°C. Thermal shut-down releases the output after the die temperature decreases 10°C. Control Input Applying a logic-high input to CTL (control input) activates the thermal shutdown and gate control circuits. If there are no fault conditions, the output MOSFET turns on. Current Limit The current limit is preset internally. The preset level prevents damage to the output MOSFET but allows a typical current of 1.9A through the output MOSFET for the MIC2514. This current limit is sufficient to protect the bond wire and the output device from instantaneous high current. Package thermal ratings and power dissipation should be considered when determining safe continuous operating current. Output current is monitored by sensing the voltage drop across the output MOSFET source metal resistance. Gate Control The gate control circuit applies the supply voltage to the output MOSFET gate, turning it off, or forces the MOSFET gate below the supply voltage, turning it on, as determined by CTL and thermal shutdown. Input and Output IN (input) is the supply connection to the logic circuitry and the source of the output MOSFET. OUT (output) is the drain of the output MOSFET. In a typical circuit; current flows through the switch from IN to OUT toward the load. August 2008 5 M9999-082808-C MIC2514 Micrel, Inc. Package Information 5-Pin SOT-23 (M5) 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 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. © 1997 Micrel, Incorporated. August 2008 6 M9999-082808-C