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MIC2514
IttyBitty(R) Integrated High-Side Switch
General Description
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 170C. The MIC2514 is available in the 5-pin SOT-23-5 package with a temperature range of -40C to +85C. Datasheets and support documentation can be found on Micrel's web site at:www.micrel.com.
Features
* MOSFET on-resistance - 1.5 typical at 5V - 0.95 typical at 12V * 3V to 13.5V input * 25A typical on-state supply current at 5V * <1A typical off-state supply current at 5V * Current limit * Thermal shutdown * Slow turn-on
Applications
* 3.3V to 13.5V power management
Ordering Information
Part Number Standard MIC2514BM5 Pb-Free MIC2514YM5 Temp. Range -40 to +85C Package 5-Pin SOT-23
Typical Application
Pin Configuration
1
3
IN GND CTL
3 2 1
4
F10
4 5
Part Identification
OUT
NC
High-Side Power Switch
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
Micrel, Inc.
MIC2514
Pin Description
Pin Number 1 2 3 4 5 Pin Name CTL GND IN OUT NC Pin Function Control (Input): Non-inverting TTL compatible control input. High = on, low = off. Ground 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)
Supply Voltage (VIN) .....................................................+20V Output Current (IOUT). ................................Internally Limited Control Input (VCTL) ......................................... -0.3V to 15V Storage Temperature (TS).........................-65C to +150C
Operating Ratings(2)
Supply voltage (VIN) ...................................... +3V to +13.5V Ambient Temperature (TA) .......................... -40C to +85C Junction Thermal Resistance (JA) .................................................................220C/W (JC) .................................................................130C/W Control Input (VCTRL)...........................................-0.3V to VIN
Electrical Characteristics
VIN = 5V; TA = 25C, except bold values indicate -40C< TA < +85C, Note 3; unless noted.
Parameter Supply Current Condition VCTL = logic 0, VIN = 5V VCTL = logic 0, VIN = 13.5V VCTL = logic 1, VIN = 3V VCTL = logic 1, VIN = 5V VCTL = logic 1, VIN = 13.5V Control Input Voltage VCTL = logic 0, 3V VIN 13.5V VCTL = logic 1, 3V VIN 5V VCTL = logic 1, 5V VIN 13.5V Output MOSFET Resistance VIN = 3V VIN = 5V VIN = 12V Current Limit Threshold VIN = 3V VIN = 5V VIN = 12V 0 0.8 0.8 1.45 1.65 2.4 1.5 0.95 0.5 1.4 1.9 Min Typ 0.6 2.0 10 25 95 Max 10 25 20 40 200 0.79 2.0 2.3 4.5 2.4 2.7 1.5 1.7 1.5 2.0 2.5 Units A A A A A V V V A A A
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 25C, but Devices guaranteed over indicated temperature range.
August 2008
2
M9999-082808-C
Micrel, Inc.
MIC2514
Typical Characteristics
On-Resistance vs. Supply Voltage
VCTL = 5V ON-RESISTANCE ( ) 2 TA = 25C
3
1
0
0
5 10 15 SUPPLY VOLTAGE (V)
200 SUPPLY CURRENT (A) 150 100 50
On-State SupplyCurrent vs. Temperature
V = 13.5V
IN
VIN = 5V
0 -60 -30 0 30 60 90 120 150 TEMPERATURE C) (
2.5 2.0 THRESHOLD (V) 1.5 1.0 0.5
Control Input Threshold vs. Temperature
VCTL = VS = 13.5V TURN-ON DELAY TIME (s) VCTL = VS = 13.5V
100
Turn-On Delay Time vs. Load Capacitance
IL = 5mA, T = 25C A VIN = 5V
10 VIN = 13.5V 1 0.1
VCTL = VIN = 5V
VCTL = VIN = 5V
0 -60 -30 0 30 60 90 120 150 TEMPERATURE C) (
1 10 100 1000 LOAD CAPACITANCE (nF)
80 60
Rise Time vs. Load Current
RISE TIME (s)
VIN = 5V 40 20
TA = 25C
VIN = 13.5V 0 0 0.4 0.8 1.2 LOAD CURRENT (A) 1.6
August 2008
3
M9999-082808-C
Micrel, Inc.
MIC2514
Typical Characteristics (continued)
10 1 0.1 0.01 0.001 0.1
Fall Time vs. Load Capacitance
IL = 5mA, T = 25C A
FALL TIME (ms)
VIN = 13.5V VIN = 5V 1 10 100 1000 LOAD CAPACITANCE (nF)
August 2008
4
M9999-082808-C
Micrel, Inc.
MIC2514
Functional Diagram
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. 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. 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.
The output MOSFET has an intrinsic body diode which will conduct if OUT is forced to a higher voltage than IN. Thermal Shutdown Thermal shutdown turns off the output MOSFET if the die temperature exceeds approximately 170C. Thermal shut-down releases the output after the die temperature decreases 10C. 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.
August 2008
5
M9999-082808-C
Micrel, Inc.
MIC2514
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. (c) 1997 Micrel, Incorporated.
August 2008
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M9999-082808-C

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