LTC4444EMS8E-5#TRPBF Linear Technology, LTC4444EMS8E-5#TRPBF Datasheet

IC MOSFET DRIVER N-CH 8-MSOP

LTC4444EMS8E-5#TRPBF

Manufacturer Part Number
LTC4444EMS8E-5#TRPBF
Description
IC MOSFET DRIVER N-CH 8-MSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4444EMS8E-5#TRPBF

Configuration
High and Low Side, Synchronous
Input Type
Differential, PWM
Delay Time
33ns
Current - Peak
1.4A
Number Of Configurations
1
Number Of Outputs
2
High Side Voltage - Max (bootstrap)
114V
Voltage - Supply
4.5 V ~ 13.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC4444EMS8E-5#TRPBFLTC4444EMS8E-5
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC4444EMS8E-5#TRPBFLTC4444EMS8E-5
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No R
property of their respective owners. Protected by U.S. Patents, including 6677210.
TYPICAL APPLICATION
(FROM CONTROLLER IC)
(FROM CONTROLLER IC)
Bootstrap Supply Voltage to 114V
Wide V
Adaptive Shoot-Through Protection
1.4A Peak Top Gate Pull-Up Current
1.75A Peak Bottom Gate Pull-Up Current
1.5Ω Top Gate Driver Pull-Down
0.75Ω Bottom Gate Driver Pull-Down
5ns Top Gate Fall Time Driving 1nF Load
8ns Top Gate Rise Time Driving 1nF Load
3ns Bottom Gate Fall Time Driving 1nF Load
6ns Bottom Gate Rise Time Driving 1nF Load
Drives Both High and Low Side N-Channel MOSFETs
Undervoltage Lockout
Thermally Enhanced 8-Pin MSOP Package
Distributed Power Architectures
Automotive Power Supplies
High Density Power Modules
Telecommunication Systems
SENSE
is a trademark of Linear Technology Corporation. All other trademarks are the
4.5V TO 13.5V
CC
PWM1
PWM2
Voltage: 4.5V to 13.5V
V
High Input Voltage Buck Converter
CC
V
TINP
BINP
CC
LTC4444-5
BOOST
GND
BG
TG
TS
100V
V
IN
44445 TA01a
V
OUT
DESCRIPTION
The LTC
driver that drives two N-channel MOSFETs in a synchro-
nous DC/DC converter with supply voltages up to 100V.
This powerful driver reduces switching losses in MOSFETs
with high gate capacitance.
The LTC4444-5 is configured for two supply-indepen-
dent inputs. The high side input logic signal is internally
level-shifted to the bootstrapped supply, which may func-
tion at up to 114V above ground.
The LTC4444-5 contains undervoltage lockout circuits that
disable the external MOSFETs when activated. Adaptive
shoot-through protection prevents both MOSFETs from
conducting simultaneously.
For a similar driver in this product family, please refer to
the chart below.
PARAMETER
Shoot-Through Protection
Absolute Max TS
MOSFET Gate Drive
V
V
High Voltage Synchronous
CC
CC
N-Channel MOSFET Driver
UV
UV
+
5V/DIV
5V/DIV
5V/DIV
5V/DIV
TG-TS
BINP
TINP
BG
®
LTC4444-5 Driving a 1000pF Capacitive Load
4444-5 is a high frequency high voltage gate
4.5V to 13.5V 7.2V to 13.5V 7.2V to 13.5V
LTC4444-5
100V
3.5V
Yes
20ns/DIV
4V
LTC4446
LTC4444-5
6.15V
100V
6.6V
No
44445 TA01b
LTC4444
6.15V
100V
6.6V
Yes
44445fc
1

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LTC4444EMS8E-5#TRPBF Summary of contents

Page 1

... Automotive Power Supplies n High Density Power Modules n Telecommunication Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and trademark of Linear Technology Corporation. All other trademarks are the SENSE property of their respective owners. Protected by U.S. Patents, including 6677210. ...

Page 2

... Storage Temperature Range ..................–65°C to 150°C Lead Temperature (Soldering, 10 sec) ................... 300°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC4444EMS8E-5#PBF LTC4444EMS8E-5#TRPBF LTC4444IMS8E-5#PBF LTC4444IMS8E-5#TRPBF LTC4444HMS8E-5#PBF LTC4444HMS8E-5#TRPBF LTC4444MPMS8E-5#PBF LTC4444MPMS8E-5#TRPBF Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER I Input Pin Bias Current TINP(BINP) High Side Gate Driver Output (TG High Output Voltage OH(TG Low Output Voltage OL(TG Peak Pull-Up Current ...

Page 4

LTC4444-5 TYPICAL PERFORMANCE CHARACTERISTICS V Supply Quiescent Current CC vs Voltage 450 T = 25°C A BOOST = 6V 400 TINP = BINP = GND 350 300 TINP (BINP 250 200 150 100 50 0 ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Input Thresholds (TINP , BINP) Hysteresis vs Temperature 500 V = BOOST = GND 475 450 425 400 375 –55 – 125 150 TEMPERATURE (°C) 44445 G10 Rise and ...

Page 6

LTC4444-5 TYPICAL PERFORMANCE CHARACTERISTICS Switching Supply Current vs Input Frequency 1 25° BOOST = 6V 1 GND 1.4 1.2 I BOOST (TG SWITCHING) 1.0 0.8 0.6 I (TG SWITCHING) VCC 0.4 I ...

Page 7

BLOCK DIAGRAM 4.5V TO 13.5V GND 9 TINP 1 BINP 2 TIMING DIAGRAMS BINP BG TINP TG-TS TINP (BINP) BINP (TINP) BG (TG) TG (BG) UVLO CC HIGH SIDE LEVEL SHIFTER LDO V INT ANTISHOOT-THROUGH PROTECTION ...

Page 8

LTC4444-5 OPERATION Overview The LTC4444-5 receives ground-referenced, low voltage digital input signals to drive two N-channel power MOSFETs in a synchronous buck power supply configuration. The gate of the low side MOSFET is driven either to V depending on the ...

Page 9

OPERATION pull-down on the driver outputs is the prevention of cross- conduction current. For example, when BG turns the low side (synchronous) power MOSFET off and TG turns the high side power MOSFET on, the voltage on the TS pin ...

Page 10

LTC4444-5 APPLICATIONS INFORMATION At a particular switching frequency, the internal power loss increases due to both AC currents required to charge and discharge internal node capacitances and cross-conduc- tion currents in the internal logic gates. The sum of the quiescent ...

Page 11

TYPICAL APPLICATION LTC3780 High Efficiency 36V to 72V V 10k 0.022μF 100Ω SENSE PGOOD 1000pF 2 220k 68pF SS 100Ω 3 – SENSE SENSE 100pF 4 SENSE 0.1μF 5 487k + V I 100V ...

Page 12

LTC4444-5 PACKAGE DESCRIPTION 1.88 0.102 (.074 .004) 5.23 (.206) MIN 0.42 0.038 (.0165 .0015) TYP RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0.254 (.010) GAUGE PLANE DETAIL “A” 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. ...

Page 13

... H-grade part added. Reflected throughout the data sheet. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 14

... Peak Pull-Up/ CC ≤ 15V, 2.4A Peak Pull-Up/ CC ≤ 9.5V, 3.2A Peak Pull-Up/ CC ≤ 6.5V, 3.2A Peak Pull-Up/ CC ≤ 25V, 6A Peak Output Current CC LT 0111 REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 100μF 80V 100V 2 V OUT 12V ...

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