MIC5014/5015
Micrel, Inc.
MIC5014/5015
Low-Cost High- or Low-Side MOSFET Driver
General Description
Features
MIC5014 and MIC5015 MOSFET drivers are designed for • 2.75V to 30V operation
gate control of N-channel, enhancement-mode, power • 100µA maximum supply current (5V supply)
MOSFETs used as high-side or low-side switches. • 15µA typical off-state current
The MIC5014/5 can sustain an on-state output indefinitely.
• Internal charge pump
• TTL compatible input
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.
• 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
The MIC5014/5 has a TTL compatible control input.
The MIC5014 is noninverting while the MIC5015 is inverting.
• Operates in high-side or low-side configurations
• 1µA control input pull-off
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.
• Inverting and noninverting versions
Applications
• Automotive electrical load control
• Battery-powered computer power management
• Lamp control
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 exter-
nal MOSFET at approximately 35V to protect the load against
power supply excursions.
• Heater control
• Motor control
• Power bus switching
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
+3V to +4V
10µF
MIC5014
1
2
3
4
8
7
6
5
V+
NC
Control Input
ON
OFF
Input
NC
Source
Gnd
NC
Gate
IRLZ24
Figure 1. 3V “Sleep-Mode” Switch
with a Logic-Level MOSFET
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MIC5014/5015
June 2005
1