MIC5014-1 MICREL [Micrel Semiconductor], MIC5014-1 Datasheet

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MIC5014-1

Manufacturer Part Number
MIC5014-1
Description
Low-Cost High- or Low-Side MOSFET Driver Final Information
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
MIC5014/5015
General Description
MIC5014 and MIC5015 MOSFET drivers are designed for
gate control of N-channel, enhancement-mode, power
MOSFETs used as high-side or low-side switches. The
MIC5014/5 can sustain an on-state output indefinitely.
The MIC5014/5 operates from a 2.75V to 30V supply. In high-
side configurations, the driver can control MOSFETs that
switch loads of up to 30V. In low-side configurations, with
separate supplies, the maximum switched voltage is limited
only by the MOSFET.
The MIC5014/5 has a TTL compatible control input. The
MIC5014 is noninverting while the MIC5015 is inverting.
The MIC5014/5 features an internal charge pump that can
sustain a gate voltage greater than the available supply
voltage. The driver is capable of turning on a logic-level
MOSFET from a 2.75V supply or a standard MOSFET from a
5V supply. The gate-to-source output voltage is internally
limited to approximately 15V.
The MIC5014/5 is protected against automotive load dump,
reversed battery, and inductive load spikes of –20V. The
driver’s overvoltage shutdown feature turns off the external
MOSFET at approximately 35V to protect the load against
power supply excursions.
The MIC5014 is an improved pin-for-pin compatible replace-
ment in many MIC5011 applications.
The MIC5014/5 is available in plastic 8-pin DIP and 8-pin
SOIC pacakges.
Typical Application
1997
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
OFF
ON
Control Input
10µF
Figure 1. 3V “Sleep-Mode” Switch
with a Logic-Level MOSFET
1
2
3
4
V+
Input
Source
Gnd
MIC5014
Gate
NC
NC
NC
8
7
6
5
+3V to +4V
IRLZ24
1
Features
• 2.75V to 30V operation
• 100 A maximum supply current (5V supply)
• 15 A typical off-state current
• Internal charge pump
• TTL compatible input
• Withstands 60V transient (load dump)
• Reverse battery protected to –20V
• Inductive spike protected to –20V
• Overvoltage shutdown at 35V
• Internal 15V gate protection
• Minimum external parts
• Operates in high-side or low-side configurations
• 1 A control input pull-off
• Inverting and noninverting versions
Applications
• Automotive electrical load control
• Battery-powered computer power management
• Lamp control
• Heater control
• Motor control
• Power bus switching
Ordering Information
Part Number
Noninverting
MIC5014BM
MIC5014BN
Inverting
MIC5015BM
MIC5015BN
Low-Cost High- or Low-Side MOSFET Driver
MIC5014/5015
Temperature Range
Final Information
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
8-pin Plastic DIP
8-pin Plastic DIP
8-pin SOIC
8-pin SOIC
Package
MIC5014/5015
Micrel

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MIC5014-1 Summary of contents

Page 1

... N-channel, enhancement-mode, power MOSFETs used as high-side or low-side switches. The MIC5014/5 can sustain an on-state output indefinitely. The MIC5014/5 operates from a 2.75V to 30V supply. In high- side configurations, the driver can control MOSFETs that switch loads 30V. In low-side configurations, with separate supplies, the maximum switched voltage is limited only by the MOSFET ...

Page 2

... Source 4 Ground 5 Gate MIC5014/5015 V+ (1) Charge Pump 15V Pin Function Supply. Must be decoupled to isolate from large transients caused by the power MOSFET drain recommended close to pins 1 and 4. Turns on power MOSFET when taken above (or below) threshold (1.0V typical). Pin 2 requires ~ switch. ...

Page 3

... Note 4: Test conditions reflect worst case high-side driver performance. Low-side and bootstrapped topologies are significantly faster—see Applications Information. Maximum value of switching time seen at 125 C, unit operated at room temperature will reflect the typical value shown. Note 5: “Asserted” refers to a logic high on the MIC5014 and a logic low on the MIC5015. 1997 Operating Ratings (Notes 1,2) (Plastic DIP) ...

Page 4

... SUPPLY VOLTAGE (V) Charge-Pump Output Current 1000 28V 100 12V 5V 10 Source connected 3V to supply: supply voltage as noted GATE-TO-SOURCE VOLTAGE (V) MIC5014/5015 Gate Enhancement vs. Supply Voltage Gate Enhancement = V – V GATE SUPPLY SUPPLY VOLTAGE (V) ...

Page 5

... The internal functions of these devices are controlled via a logic block (refer to block diagram) connected to the control input (pin 2). When the input is off (low for the MIC5014, and high for the MIC5015), all functions are turned off, and the gate of the external power MOSFET is held low via two N- channel switches. This results in a very low standby current ...

Page 6

... MIC5014 (polarities should be reversed if the MIC5015 is used). One the overcurrent trip point has been reached, the comparator will go low, which shuts off the MIC5014. When the MIC5014/5015 the short is removed, feedback to the input pin insures that the MIC5014 will turn back on ...

Page 7

... Also, too large of a kickback voltage (as is found in larger solenoids) can damage the MIC5014 or the power FET by forcing the Source node below ground (the MIC5014 can be driven up to 20V = +5V to +30V below ground before this happens). A catch diode has been included in this design to provide an alternate route for the inductive kickback current to flow ...

Page 8

... IRF540 OSRAM Simple DC-DC Converter (Figure 11) The simplest applica- tion for the MIC5014 basic one-chip DC-DC converter. As the output (Gate) pin has a relatively high impedance, the output voltage shown will vary significantly with applied load. 12V IRF540 Guardian Electric 1725-1C-12D ...

Page 9

... FET will be forward biased. This allows the reversed supply access to the load. Push-Pull Driver With No Cross-Conduction (Figure 13) As the turn-off time of the MIC5014/15 devices is much faster than the turn-on time, a simple push-pull driver with no cross conduction can be made using one MIC5014 and one MIC5015. The same control signal is applied to both inputs ...

Page 10

... MIC5014/5015 Package Information 0.018 (0.57) 0.026 (0.65) 0.157 (3.99) 0.150 (3.81) 0.064 (1.63) 0.045 (1.14) MIC5014/5015 PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 (0.952) 8-Pin Plastic DIP (N) MAX) PIN 1 DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) 0.050 (1.27) TYP 0.0098 (0.249) 0.0040 (0.102) 0 –8 0.197 (5.0) 0.189 (4.8) ...

Page 11

... MIC5014/5015 1997 11 Micrel MIC5014/5015 ...

Page 12

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC5014/5015 + 1 (408) 944-0970 http://www ...

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