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MIC2514
Micrel
MIC2514
IttyBittyTM Integrated High-Side Switch Preliminary Information
General Description
The MIC2514 is an integrated high-side power switch that consists of a TTL compatible input and protected P-channel 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 turnon 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-lead SOT-23-5 package with a temperature range of -40C to +85C.
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 MIC2514BM5 Temperature Range -40C to +85C Package SOT-23-5
Pin Configuration
Typical Application
3V to 13.5V MIC2514
On Off 1
CTL GND
IN OUT
3
0.1F
IN GND CTL
3 2 1
2
4
F10
4 5
OUT
NC
5-Lead SOT-23-5 (M5)
High-Side Power Switch
Pin Description
Pin Number 1 2 3 4 5 Pin Name CTL GND IN OUT NC Pin Function Control (Input): Noninverting 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.
6-18
Load
Part Identification
1997
MIC2514
Micrel
Absolute Maximum Ratings
Supply Voltage (VIN) ................................................... +20V Output Current (IOUT) ............................... Internally Limited Control Input (VCTL) ....................................... -0.3V to 15V Storage Temperature (TA) ....................... -65C to +150C
Operating Ratings
Supply Voltage (VIN) .................................... +3V to +13.5V Ambient Operating Temperature (TA) ........ -40C to +85C Thermal Resistance (JA) ................................................................... 220C/W (JC) .................................................................. 130C/W
Electrical Characteristics
VIN = +5V; TA = 25C, except bold values indicate -40C TA 85C, Note 1; 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 .95 0.5 1.4 1.9 Min Typ 0.6 2.0 10 25 95 Max 10 25 20 40 200 0.8 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 protected, however, handling precautions recommended. Note 1: Devices production tested at 25C, but Devices guaranteed over indicated temperature range.
6
1997
6-19
MIC2514
Micrel
Typical Characteristics
On-Resistance vs. Supply Voltage
3 VCTL = 5V ON-RESISTANCE ()
On-Resistance vs. Temperature
2.5 VCTL = 5V ON-RESISTANCE () VIN = 5V 1.5 1.0 VIN = 13.5V 0.5 0 -80 -40 0 40 80 120 160 AMBIENT TEMPERATURE (C)
CURRENT LIMIT (A)
2.5 2.0 1.5
Current Limit vs. Supply Voltage
25C
2
TA = 25C
2.0
75C -25C 125C
1.0 0.5 0
1
0
0
5 10 SUPPLY VOLTAGE (V)
15
0
5 10 SUPPLY VOLTAGE (V)
15
On-State Supply Current vs. Temperature
200 SUPPLY CURRENT (A) SUPPLY CURRENT (A)
4
Off-State Current Supply vs. Supply Voltage
2.5 SUPPLY CURRENT (A) VCTL = 0V
Off-State Supply Current vs. Temperature
VIN = 5V 2.0 VCTL = 0V 1.5 1.0 0.5 0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
150 VIN = 13.5V
3 TA = 25C 2
100
50
VIN = 5V
1
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
0
0
5 10 SUPPLY VOLTAGE (V)
15
Control Input Threshold vs. Supply Voltage
2.0 CONTROL VOLTAGE (V) TA = 25C 1.5 CTL FALLING 1.0 CTL RISING THRESHOLD (V) 2.5 2.0 1.5 1.0 0.5
Control Input Threshold vs. Temperature
VCTL = VS = 13.5V
Turn-On Delay Time vs. Load Capacitance
100 TURN-ON DELAY TIME (s) IL = 5mA, TA = 25C
VCTL = VS = 13.5V
a
_
VIN = 5V 10
0.5
VCTL = VIN = 5V
a
VCTL = VIN = 5V
_
VIN = 13.5V 1 0.1
0
0
5 10 SUPPLY VOLTAGE (V)
15
0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
1 10 100 1000 LOAD CAPACITANCE (nF)
Turn-On Delay Time vs. Load Current
60 TURN-ON DELAY TIME (s)
Rise Time vs. Load Capacitance
100 TA = 25C RISE TIME (s)
Rise Time vs. Load Current
80
40
RISE TIME (s)
VIN = 5V TA = 25C
60 VIN = 5V 40 TA = 25C
10
VIN = 5V
20 VIN = 13.5V 0 0 0.2 0.4 0.6 0.8 1.0 LOAD CURRENT (A) 1.2
20 VIN = 13.5V 0 0 0.4 0.8 1.2 LOAD CURRENT (A) 1.6
VIN = 13.5V 1 0.1 1 10 100 1000 LOAD CAPACITANCE (nF)
6-20
1997
MIC2514
Micrel
Typical Characteristics
Turnoff Delay Time vs. Load Capacitance
10 IL = 200mA, TA = 25C 1
10
TURNOFF DELAY TIME (ms)
Turnoff Delay Time vs. Load Capacitance
60 TURNOFF DELAY TIME (s)
TURNOFF DELAY TIME (ms)
Turnoff Delay Time vs. Load Current
VIN = 5V
IL = 5mA, TA = 25C 1 VIN = 13.5V
40 TA = 25C CL = 0 20 VIN = 13.5V
0.1
VIN = 5V
0.1
VIN = 5V
0.01 0.1
1 10 100 1000 LOAD CAPACITANCE (pF)
0.01 0.1
VIN = 13.5V 1 10 100 1000 LOAD CAPACITANCE (nF)
0
0
0.2 0.4 0.6 0.8 1.0 LOAD CURRENT (A)
1.2
10
Fall Time vs. Load Capacitance
10 IL = 5mA, TA = 25C
Fall Time vs. Load Capacitance
IL = 200mA, TA = 25C FALL TIME (ms) 1
Fall Time vs. Load Current
30 25 TA = 25C CL = 0
FALL TIME (ms)
FALL TIME (s)
VIN = 13.5V VIN = 5V 1 10 100 1000 LOAD CAPACITANCE (nF)
1
20 15 10 5 0 0
VIN = 5V
0.1
VIN = 13.5V
0.1
0.01
VIN = 5V
0.01
VIN = 13.5V 0.5 1.0 LOAD CURRENT (A) 1.5
0.001 0.1
1 10 100 1000 LOAD CAPACITANCE (nF)
0.001 0.1
6
1997
6-21
MIC2514
Micrel
Functional Diagram
TTL CTL Compatible Input THERMAL SHUTDOWN CURRENT LIMIT
IN
+3V to +13.5V
.01
GATE CONTROL MIC2514
OUT
Functional Description
The MIC2514 is a noninverting 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 shutdown 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 sufficent 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.
6-22
Load
1997

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