MICREL MIC2514

MIC2514
Micrel
MIC2514
IttyBitty™ Integrated High-Side Switch
Preliminary Information
General Description
Features
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.
• 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
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 170°C.
The MIC2514 is available in the 5-lead SOT-23-5 package
with a temperature range of –40°C to +85°C.
Applications
• 3.3V to 13.5V power management
Ordering Information
Pin Configuration
Part Number
Temperature Range
Package
MIC2514BM5
–40°C to +85°C
SOT-23-5
Typical Application
3V to 13.5V
MIC2514
On
Off
IN GND CTL
2
2
1
Part
Identification
F10
4
5
OUT
NC
CTL
GND
IN
OUT
3
0.1µF
4
Load
3
1
5-Lead SOT-23-5 (M5)
High-Side Power Switch
Pin Description
Pin Number
Pin Name
Pin Function
1
CTL
Control (Input): Noninverting TTL compatible control input.
High = on, low = off.
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.
6-18
1997
MIC2514
Micrel
Absolute Maximum Ratings
Operating Ratings
Supply Voltage (VIN) ................................................... +20V
Output Current (IOUT) ............................... Internally Limited
Control Input (VCTL) ....................................... –0.3V to 15V
Storage Temperature (TA) ....................... –65°C to +150°C
Supply Voltage (VIN) .................................... +3V to +13.5V
Ambient Operating Temperature (TA) ........ –40°C to +85°C
Thermal Resistance
(θJA) ................................................................... 220°C/W
(θJC) .................................................................. 130°C/W
Electrical Characteristics
VIN = +5V; TA = 25°C, except bold values indicate –40°C ≤ TA ≤ 85°C, Note 1; 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
0.8
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
Ω
VIN = 12V
.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 protected, however, handling precautions recommended.
Note 1: Devices production tested at 25°C, but Devices guaranteed over indicated temperature range.
1997
6-19
6
MIC2514
Micrel
Typical Characteristics
On-Resistance
vs. Supply Voltage
On-Resistance
vs. Temperature
3
VIN = 5V
1.5
1.0
VIN = 13.5V
0.5
VIN = 13.5V
VIN = 5V
3
TA = 25°C
2
1
0
THRESHOLD (V)
CTL
FALLING
1.0
0.5
a
VCTL =
VS = 13.5V
VCTL = 0V
1.5
1.0
0.5
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
1.0
a
VCTL =
VIN = 5V
Turn-On Delay Time
vs. Load Capacitance
100
_
VCTL =
VS = 13.5V
_
VCTL =
VIN = 5V
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
Rise Time
vs. Load Capacitance
Turn-On Delay Time
vs. Load Current
1
10
100
1000
LOAD CAPACITANCE (nF)
Rise Time
vs. Load Current
100
60
15
VIN = 5V
15
1.5
0.5
15
5
10
SUPPLY VOLTAGE (V)
2.0
80
TA = 25°C
RISE TIME (µs)
VIN = 5V
40
TA = 25°C
20
10
VIN = 13.5V
0
0
0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
VIN = 5V
RISE TIME (µs)
CONTROL VOLTAGE (V)
2.0
1.5
TURN-ON DELAY TIME (µs)
5
10
SUPPLY VOLTAGE (V)
2.5
CTL
RISING
5
10
SUPPLY VOLTAGE (V)
0
Control Input Threshold
vs. Temperature
2.0
0
0.5
2.5
Control Input Threshold
vs. Supply Voltage
0
125°C
Off-State Supply Current
vs. Temperature
VCTL = 0V
0
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
TA = 25°C
1.0
0
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
150
75°C
-25°C
Off-State Current Supply
vs. Supply Voltage
4
200
50
1.5
0
-80 -40 0
40 80 120 160
AMBIENT TEMPERATURE (°C)
15
On-State Supply Current
vs. Temperature
100
2.0
TURN-ON DELAY TIME (µs)
5
10
SUPPLY VOLTAGE (V)
2.0
CURRENT LIMIT (A)
ON-RESISTANCE (Ω)
ON-RESISTANCE (Ω)
1
0
25°C
VCTL = 5V
TA = 25°C
2
0
2.5
2.5
VCTL = 5V
Current Limit
vs. Supply Voltage
60
VIN = 5V
40
20
VIN = 13.5V
1.2
1
0.1
1
10
100
1000
LOAD CAPACITANCE (nF)
6-20
TA = 25°C
VIN = 13.5V
0
0
0.4
0.8
1.2
LOAD CURRENT (A)
1.6
1997
MIC2514
Micrel
Typical Characteristics
10
0.1
0.01
0.1
10
VIN = 5V
IL = 200mA, TA = 25°C
1
0.1
0.01
0.1
1
10
100
1000
LOAD CAPACITANCE (pF)
Fall Time
vs. Load Capacitance
FALL TIME (ms)
FALL TIME (ms)
0.001
0.1
VIN = 13.5V
VIN = 5V
1
10
100
1000
LOAD CAPACITANCE (nF)
0.1
0.01
0.001
0.1
40
TA = 25°C
CL = 0
20
VIN = 13.5V
0.2 0.4 0.6 0.8 1.0
LOAD CURRENT (A)
1.2
30
25
VIN = 5V
20
TA = 25°C
CL = 0
15
10
VIN = 13.5V
5
VIN = 5V
0
1
10
100
1000
LOAD CAPACITANCE (nF)
0
Fall Time
vs. Load Current
IL = 200mA, TA = 25°C
1
VIN = 5V
0
10
1
0.01
VIN = 13.5V
1
10
100
1000
LOAD CAPACITANCE (nF)
Fall Time
vs. Load Capacitance
IL = 5mA, TA = 25°C
0.1
VIN = 5V
FALL TIME (µs)
1
VIN = 13.5V
Turnoff Delay Time
vs. Load Current
60
TURNOFF DELAY TIME (µs)
IL = 5mA, TA = 25°C
TURNOFF DELAY TIME (ms)
TURNOFF DELAY TIME (ms)
10
Turnoff Delay Time
vs. Load Capacitance
Turnoff Delay Time
vs. Load Capacitance
VIN = 13.5V
0
0.5
1.0
LOAD CURRENT (A)
1.5
6
1997
6-21
MIC2514
Micrel
Functional Diagram
TTL
CTL
Compatible
Input
IN
THERMAL
SHUTDOWN
CURRENT
LIMIT
GATE
CONTROL
+3V to +13.5V
.01Ω
OUT
Load
MIC2514
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 170°C. Thermal shutdown releases the output after the die temperature decreases 10°C.
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
1997