MIC4605
85V Half-Bridge MOSFET Drivers
with Adaptive Dead Time and
Shoot-Through Protection
General Description
The MIC4605 is an 85V half-bridge MOSFET driver that
features adaptive-dead-time and shoot-through protection.
The adaptive-dead-time circuitry actively monitors the half-
bridge outputs to minimize the time between high-side and
low-side MOSFET transitions, thus maximizing power
efficiency. Anti-shoot-through circuitry prevents erroneous
inputs and noise from turning both MOSFETS on at the
same time.
The MIC4605 also offers a wide 5.5V to 16V operating
supply range to maximize system efficiency. The low 5.5V
operating voltage allows longer run times in battery-
powered applications. Additionally, the MIC4605’s
adjustable gate drive sets the gate drive voltage to VDD
for optimal MOSFET R
DS(ON)
, which minimizes power loss
due to the MOSFET’s R
DS(ON)
.
The MIC4605 is available in an 8-pin SOIC package and a
tiny 10-pin 2.5mm × 2.5mm TDFN package. Both
packages have an operating junction temperature range of
–40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at:
www.micrel.com.
Features
•
5.5V to 16V gate drive supply voltage range
•
Advanced adaptive-dead-time
•
Intelligent shoot-through protection
−
MIC4605-1: Dual TTL inputs
−
MIC4605-2: Single PWM input
•
Enable input for on/off control
•
On-chip bootstrap diode
•
Fast 35ns propagation times
•
Drives 1000pF load with 20ns rise and fall times
•
Low power consumption: 135µA quiescent current
•
Separate high- and low-side undervoltage protection
•
–40°C to +125°C junction temperature range
Applications
•
•
•
•
•
•
Fans
Power inverters
High-voltage step-down regulators
Half-, full-, and three-phase bridge motor drives
Appliances
E-bikes
MIC4605 Door Lock/Unlock Module
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
November 11, 2013
Revision 1.0
Micrel, Inc.
MIC4605
Ordering Information
Part Number
MIC4605-1YMT
MIC4605-2YMT
MIC4605-1YM
MIC4605-2YM
Part Marking
165
265
4605-1YM
4605-2YM
Input
Dual TTL Inputs
Single PWM TTL Input
Dual TTL Inputs
Single PWM TTL Input
Junction Temperature Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
10-pin 2.5mm × 2.5mm TDFN
10-pin 2.5mm × 2.5mm TDFN
8-pin SOIC-8
8-pin SOIC-8
Pin Configurations
MIC4605-1YMT
10-Pin 2.5mm × 2.5mm TDFN (MT)
(Top View)
MIC4605-2YMT
10-Pin 2.5mm × 2.5mm TDFN (MT)
(Top View)
MIC4605-1YM
8-Pin SOIC (M)
(Top View)
MIC4605-2YM
8-Pin SOIC (M)
(Top View)
November 11, 2013
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Revision 1.0
Micrel, Inc.
MIC4605
Pin Description
MIC4605-1
TDFN
Pin
Number
1
MIC4605-2
TDFN
Pin
Number
1
MIC4605-1
SOIC-8
Pin
Number
—
MIC4605-2
SOIC-8
Pin
Number
—
Pin
Name
Pin Function
EN
Enable Input. Logic high on the enable pin results in
normal operation, conversely, the device enters shutdown
mode with a logic low applied to enable.
Input Supply for Gate Drivers. Decouple this pin to VSS
with a >0.1µF capacitor.
High-Side Bootstrap Supply. An external bootstrap
capacitor is required. Connect the bootstrap capacitor
across this pin and HS. An on-board bootstrap diode is
connected from VDD to HB.
High-Side Drive Output. Connect to the gate of the
external high-side power MOSFET.
High-Side Drive Reference Connection. Connect to
source of the external high-side power MOSFET. Connect
the bottom of bootstrap capacitor to this pin.
High-Side Drive Input
Single PWM Input. Drives both the high- and low-side
outputs out of phase
Low-Side Drive Input.
No Connect. This pin is not connected internally.
Driver Reference Supply Input. Generally connected to
the power ground of external circuitry.
Low-Side Drive Output. Connect to the gate of the
external low-side power MOSFET.
No Connect. This pin is not connected internally.
Exposed Pad. Connect to VSS.
2
2
1
1
VDD
3
3
2
2
HB
4
4
3
3
HO
5
6
—
7
—
8
9
10
EP
5
—
6
—
7
8
9
10
EP
4
5
—
6
—
7
8
—
—
4
—
5
—
6
7
8
—
—
HS
HI
PWM
LI
NC
VSS
LO
NC
ePad
November 11, 2013
3
Revision 1.0
Micrel, Inc.
MIC4605
Absolute Maximum Ratings
(1)
Supply Voltage (VDD, V
HB
– V
HS
) ....................
−0.3V
to 18V
Input Voltages (V
LI
, V
HI
, V
EN
) ...............
−0.3V
to VDD + 0.3V
Voltage on LO (V
LO
) ............................
−0.3V
to VDD + 0.3V
Voltage on HO (V
HO
) ..................... V
HS
−
0.3V to V
HB
+ 0.3V
Voltage on HS (continuous) ...............................
−1V
to 90V
Voltage on HB .............................................................. 108V
Average Current in VDD to HB Diode ....................... 100mA
Storage Temperature (T
S
) .........................
−60°C
to +150°C
(3)
ESD Rating
HBM ......................................................................... 1kV
MM ......................................................................... 200V
Operating Ratings
(2)
Supply Voltage (VDD) [decreasing VDD]........ 5.25V to 16V
Supply Voltage (VDD) [increasing VDD] ........... 5.5V to 16V
Voltage on HS ....................................................
−1V
to 85V
Voltage on HS (repetitive transient) ...................
−5V
to 90V
HS Slew Rate ............................................................ 50V/ns
Voltage on HB ..................................................... V
HS
+ VDD
and/or...................................... VDD
−
1V to VDD + 85V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
2.5mm × 2.5mm TDFN-10L (θ
JA
) .................... 71.4°C/W
SOIC-8L (θ
JA
) ..................................................... 99°C/W
Electrical Characteristics
(4)
VDD = V
HB
= 12V; VSS = V
HS
= 0V; No load on LO or HO; T
A
= +25°C; unless otherwise noted.
Bold
values indicate –40°C ≤ T
J
≤ +125°C.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Supply Current
I
DD
I
DDSH
I
DDO
I
HB
I
HBO
I
HBS
I
HBSO
VDD Quiescent Current
VDD Shutdown Current
VDD Operating Current
Total HB Quiescent Current
Total HB Operating Current
HB to VSS Current, Quiescent
HB to VSS Current, Operating
(5)
LI = HI = 0V
EN = 0V with HS = floating
EN = 0V
f = 20kHz
LI = HI = 0V or LI = 0V and HI =5V
f = 20kHz
V
HS
= V
HB
= 90V
f = 20kHz
100
2.2
25
170
35
50
0.05
30
250
10
50
500
75
400
5
300
µA
µA
µA
µA
µA
µA
µA
Input (TTL: LI, HI, EN)
V
IL
V
IH
V
HYS
R
I
Low-Level Input Voltage
High-Level Input Voltage
Input Voltage Hysteresis
Input Pull-Down Resistance
LI and HI
PWM
100
50
2.2
0.1
300
130
0.8
V
V
V
500
250
kΩ
Undervoltage Protection
V
DDR
V
DDH
V
HBR
V
HBH
Notes:
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating ratings.
3. Devices are ESD sensitive. Handling precautions are recommended.
4. Specification for packaged product only.
5. V
IL (MAX)
= maximum positive voltage applied to the input which will be accepted by the device as a logic low. V
IH (MIN)
= minimum positive voltage
applied to the input which will be accepted by the device as a logic high.
VDD Falling Threshold
VDD Threshold Hysteresis
HB Falling Threshold
HB Threshold Hysteresis
4.0
4.4
0.25
4.9
V
V
4.0
4.4
0.25
4.9
V
V
November 11, 2013
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Revision 1.0
Micrel, Inc.
MIC4605
Electrical Characteristics
(4)
(Continued)
VDD = V
HB
= 12V; VSS = V
HS
= 0V; No load on LO or HO; T
A
= +25°C; unless otherwise noted.
Bold
values indicate –40°C ≤ T
J
≤ +125°C.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
Bootstrap Diode
V
DL
V
DH
R
D
Low-Current Forward Voltage
High-Current Forward Voltage
Dynamic Resistance
I
VDD-HB
= 100µA
I
VDD-HB
= 50mA
I
VDD-HB
= 50mA
0.4
0.7
2.0
0.70
1.0
5.0
V
V
Ω
V
V
A
A
LO Gate Driver
V
OLL
V
OHL
I
OHL
I
OLL
Low-Level Output Voltage
High-Level Output Voltage
Peak Sink Current
Peak Source Current
I
LO
= 50mA
I
LO
=
−50mA,
V
OHL
= VDD
−
V
LO
V
LO
= 0V
V
LO
= 12V
0.3
0.5
1
1
0.6
1.0
HO Gate Driver
V
OLH
V
OHH
I
OHH
I
OLH
Low-Level Output Voltage
High-Level Output Voltage
Peak Sink Current
Peak Source Current
I
HO
= 50mA
I
HO
=
−50mA,
V
OHH
= V
HB
– V
HO
V
HO
= 0V
V
HO
= 12V
0.3
0.5
1
1
0.6
1.0
V
V
A
A
Switching Specifications
(LI/HI mode with inputs non-overlapping, assumes HS low before LI goes high and LO low before HI goes high)
t
LPHL
t
HPHL
t
LPLH
t
HPLH
t
RC/FC
t
R/F
t
PW
Lower Turn-Off Propagation Delay
(LI Falling to LO Falling)
Upper Turn-Off Propagation Delay
(HI Falling to HO Falling)
Lower Turn-On Propagation Delay
(LI Rising to LO Rising)
Upper Turn-On Propagation Delay
(HI Rising to HO Rising)
Output Rise/Fall Time
Output Rise/Fall Time (3V to 9V)
Minimum Input Pulse Width that Changes the
(5)
Output
C
L
= 1000pF
C
L
= 0.1µF
35
35
35
35
20
0.8
50
75
75
75
75
ns
ns
ns
ns
ns
µs
ns
Switching Specifications PWM Mode (MIC4605-2) or LI/HI Mode (MIC4605-1) with Overlapping LI/HI Inputs
t
LOOFF
V
LOOFF
t
HOON
t
HOOFF
V
SWTH
Delay from PWM Going High / LI Low, to LO
Going Low
LO Output Voltage Threshold for LO FET to be
Considered Off
Delay from LO off to HO Going High
Delay from PWM Going Low / HI Low, to HO
Going Low
Switch Node Voltage Threshold Signaling HO is
Off
1
35
1.9
35
35
2.2
75
75
4
75
ns
V
ns
ns
V
November 11, 2013
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Revision 1.0
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