MICREL MIC5019_EB

MIC5019 Evaluation Board
Ultra-Small High-Side N-Channel MOSFET Driver
with Integrated Charge Pump
General Description
Getting Started
The MIC5019 is a high-side MOSFET driver with
integrated charge pump designed to switch an Nchannel enhancement type MOSFET in high-side or
low–side applications.
The MIC5019 operates from a 2.7V to 9V supply. It
generates gate voltages of 9.2V from a 3V supply and
16V from a 9V supply. The device consumes a low
77µA of supply current and less than 1µA of supply
current in shutdown mode.
In high-side configurations, the source voltage of the
MOSFET approaches the supply voltage when
switched on. To keep the MOSFET on, the MIC5019’s
output drives the MOSFET gate voltage higher than
the supply voltage.
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
Requirements
The MIC5019 evaluation board needs only a single
power supply to power the driver and a function
generator or logic signal to drive the IN pin. If the
application needs different supplies for driver and
load, then another supply may be used to power the
external MOSFET at the VEXT (J7 and J6) by loading
the resistor R1 and cutting the traces indicated by R4.
Precautions
The MIC5019 evaluation board does not have reverse
polarity protection. Applying a negative voltage to the
VDD and GND terminals may damage the device. The
maximum VDD of the board is rated at 10V. Exceeding
10V on the VDD could damage the device.
1. VDD Supply
Connect a supply to the VDD and GND terminals,
paying careful attention to the polarity and the supply
range (2.7V < VIN < 9V). Monitor IIN with a current
meter and VIN at VDD and GND terminals with a
voltmeter. Do not apply power until step 4.
2. Connect Function Generator to IN pin
Connect the function generator output to the IN pin
and GND.
3. OUT Signal
The voltage on the OUT pin can be monitored by
using either a voltmeter or a high-impedance scope
probe.
4. Turn on the Power
Turn on the VDD supply, apply a logic high signal to
the IN pin, and verify the OUT signal. The OUT pin is
supplied by an internal charge pump; the charge
pump is enabled when IN is logic high. The charge
pump consists of an oscillator and a voltage
quadrupler (4×). The oscillator operates from 70kHz to
100kHz, depending on the supply voltage and
temperature. The output voltage is limited to 16V,
typically by an internal zener diode clamp. The charge
pump output voltage is approximately:
VOUT = 4 × VDD – 2.8V, but not exceeding 19Vmax.
Refer to the “Output Voltage vs. Supply Voltage”
graph in the “Typical Characteristics” section.
The user has a flexibility of either soldering a FET
(Q1) or using different values of capacitors to imitate
the gate capacitance (C5).
Ordering Information
Part Number
Description
MIC5019YFT EV
MIC5019 Evaluation Board
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 2012
M9999-082212-A
[email protected] or (408) 955-1690
Micrel, Inc.
MIC5019 Evaluation Board
Typical Characteristics
VDD Supply Current
vs. Supply Voltage
VDD Supply Current
vs. Supply Voltage
1.0
1.0
20
-40°C
25°C
0.4
0.2
OUTPUT VOLTAGE (V)
SUPPLY CURRENT (µ A)
0.8
0.6
125°C
IN=GND
IN=VDD
SUPPLY CURRENT (mA)
Output Voltage
vs. Supply Voltage
0.8
0.6
0.4
25°C
-40°C
125°C
0.2
16
-40°C
25°C
12
8
4
125°C
2
0
4
6
8
4
0
10
8
6
SUPPLY VOLTAGE (V)
Output Voltage
vs. Output Current
Output Voltage
vs. Output Current
IN Current
vs. Supply Voltage
VDD=IN =5V
12
10
VDD = IN = 3.3V
8
6
VDD = IN = 2.7V
12
10
4
0
80
100
120
140
-40°C
6
2
60
25°C
8
0
40
0.8
14
2
20
IN = 2.7V
VDD=IN=5V
IN CURRENT (µ A)
OUTPUT VOLTAGE (V)
14
160
10
1.0
16
VDD=IN=9V
0
8
6
4
SUPPLY VOLTAGE (V)
18
4
2
SUPPLY VOLTAGE (V)
16
0.6
0.4
125°C
0.2
125°C
20
40
60
80
100
120
140
160
-40°C
25°C
0.0
0
0
2
4
6
8
10
SUPPLY VOLTAGE (V)
OUTPUT CURRENT (µA)
OUTPUT CURRENT (µA)
OUT Turn-Off Time
vs. Load Capacitance
OUT Turn-On Time
vs. Load Capacitance
5
20
TURN-OFF TIME (µ s)
TURN-ON TIME (ms)
2
0
10
18
OUTPUT VOLTAGE (V)
0
0.0
0.0
4
VDD=3V
3
2
VDD=9V
VDD=5V
1
0
16
12
8
VDD=3V
VDD=5V
4
VDD=9V
0
0
1000
2000
3000
CAPACITANCE (pF)
August 2012
4000
5000
0
1000
2000
3000
4000
5000
CAPACITANCE (pF)
2
M9999-082212-A
[email protected] or (408) 955-1690
Micrel, Inc.
MIC5019 Evaluation Board
MIC5019 Evaluation Board Schematic
Figure 1. MIC5019 Evaluation Board Schematic
Bill of Materials
Item
C1
Part Number
GRM188R71C104KA01D
C2
Manufacturer Description
Murata
(1)
0.1µF/16V Ceramic Capacitor, X7R, Size 0603
TDK
GRM21BR71C475KA73L
Murata
4.7µF/16V Ceramic Capacitor, X7R, Size 0805
1
(3)
AVX
R1, R3, C3, C4, Q1, C5
R2
Do not populate (DNP)
CRCW06030000FKEA
U1
1
(2)
C2012X7R1C475K
0805YC475KAT2A
Qty.
MIC5019YFT
(4)
0Ω Resistor, Size 0603, 5%
1
(5)
High-Side/Low-Side MOSFET Driver
1
Vishay Dale
Micrel. Inc.
Notes:
1.
Murata: www.murata.com.
2.
TDK: www.tdk.com.
3.
AVX: www.avx.com.
4.
Vishay: www.vishay.com.
5.
Micrel, Inc.: www.micrel.com.
August 2012
3
M9999-082212-A
[email protected] or (408) 955-1690
Micrel, Inc.
MIC5019 Evaluation Board
Evaluation Board PCB Layout
MIC5019 Evaluation Board − Copper Layer 1 (Top)
MIC5019 Evaluation Board − Copper Layer 2 (Bottom)
August 2012
4
M9999-082212-A
[email protected] or (408) 955-1690
Micrel, Inc.
MIC5019 Evaluation Board
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
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information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
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Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a
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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
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Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
August 2012
5
M9999-082212-A
[email protected] or (408) 955-1690