Current Source. LTM8042 Datasheet

LTM8042 Source. Datasheet pdf. Equivalent


Part LTM8042
Description uModule Boost LED Driver and Current Source
Feature FEATURES n True Color PWM™ with 3000:1 Dimming Ratio n Operates in Boost, Buck Mode or Buck-Boost .
Manufacture Linear Technology
Datasheet
Download LTM8042 Datasheet


FEATURES n True Color PWM™ with 3000:1 Dimming Ratio n Ope LTM8042 Datasheet
FEATURES n True Color PWM™ with 3000:1 Dimming Ratio n Ope LTM8042-1 Datasheet
Recommendation Recommendation Datasheet LTM8042 Datasheet




LTM8042
FEATURES
n True Color PWM™ with 3000:1 Dimming Ratio
n Operates in Boost, Buck Mode or Buck-Boost Mode
n Wide Input Voltage Range:
Operation from 3V to 30V
Transient Protection to 40V
n Gate Driver for Optional PWM Dimming with
P-channel MOSFET
n Adjustable Frequency: 250kHz to 2MHz
n Constant-Current and Constant-Voltage Regulation
n Low Shutdown Current: <1μA
n RoHS Compliant Package with Gold Pad Finish
n Tiny, Low Profile (9mm × 15mm × 2.82mm)
Surface Mount LGA Package
APPLICATIONS
n Display Backlighting
n Automotive and Avionic Lighting
n Illumination
n Scanners
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
LTM8042/LTM8042-1
µModule Boost LED Driver
and Current Source
DESCRIPTION
The LTM®8042 is a complete µModule® Boost LED Driver
specifically designed to drive LEDs up to 1A, while the
LTM8042-1 drives up to 350mA. It combines a boost
power topology with a unique current loop to operate as
a constant-current source. The PWM input provides as
much as 3000:1 LED dimming, while 10:1 analog dimming
can be accomplished by a single resistor or analog voltage
applied to the CTL pin. As with any boost topology, the
LTM8042/LTM8042-1 has an uninterrupted current path
between its input and output and is thus intolerant to a
short-circuit or overload from the output to ground.
# WHITE LEDS
6
7
8
9
LED CURRENT
1A
350mA
1A
350mA
12VIN
LTM8042
LTM8042-1
24VIN
LTM8042
LTM8042-1
The LTM8042/LTM8042-1 is packaged in a thermally
enhanced, compact overmolded land grid array (LGA)
package. The LTM8042/LTM8042-1 is Pb-free and a
RoHS compliant.
TYPICAL APPLICATION
µModule Boost LED Driver, Driving 8 White LEDs at 1A
VIN
16V TO 26V
4.7µF
VCC LTM8042
RUN
BSTIN/BKLED
LED+
TG
PWM BSTOUT/BKIN
SYNC
TGEN
SS
RT GND CTL
33.2k
fSW = 550kHz
UP TO 26.8V
1A
4.7µF
80421 TA01a
Efficiency vs VIN
97
96
95
94
93
92
91
90
89
88
87
16 17 18 19 20 21 22 23 24 25 26
VIN (V)
80421 TA01b
For more information www.linear.com/LTM8042
80421fb
1



LTM8042
LTM8042/LTM8042-1
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VBCSCT,ORUUTN/B, KPIWN,ML,ETDG+E..N..,..B..S...T..I.N../.B...K..L..E..D...........................................4403VV
CTL, SYNC...................................................................6V
Internal Operating Temperature
(Notes 3, 4) ............................................ –40°C to 125°C
Maximum Reflow Body Temperature ................... 245°C
Storage Temperature ............................. –55°C to 125°C
PIN CONFIGURATION
7
VCC 6
5
4
3
2
1
BSTIN/BKLED
BANK 2 BANK 3
TG
BANK 4
BANK 5
BSTOUT/BKIN LED+
BANK 1
GND
ABCDE FGHJ KL
RUN SYNC RT SS PWM
LGA PACKAGE
77-LEAD (15mm × 9mm × 2.82mm)
TJMAX = 125°C, θJA = 15.7°C/W, θJCtop = 13.6°C/W,
θJCbottom = 4.5°C/W, θJB = 9.4°C/W
θ VALUES DETERMINED PER JESD 51-12
WEIGHT = 1.1g
TGEN
CTL
ORDER INFORMATION
PART NUMBER
LTM8042EV#PBF
LTM8042IV#PBF
LTM8042EV-1#PBF
LTM8042IV-1#PBF
PAD OR BALL FINISH
Au (RoHS)
Au (RoHS)
Au (RoHS)
Au (RoHS)
PART MARKING*
DEVICE
FINISH CODE
LTM8042V
e4
LTM8042V
e4
LTM8042V-1
e4
LTM8042V-1
e4
PACKAGE TYPE
LGA
LGA
LGA
LGA
MSL RATING
3
3
3
3
TEMPERATURE RANGE
(Note 4)
40°C to 125°C
40°C to 125°C
40°C to 125°C
40°C to 125°C
Consult Marketing for parts specified with wider operating temperature
ranges. *Device temperature grade is indicated by a label on the shipping
container. Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• Recommended LGA and BGA PCB Assembly and Manufacturing
Procedures:
www.linear.com/umodule/pcbassembly
• LGA and BGA Package and Tray Drawings:
www.linear.com/packaging
80421fb
2 For more information www.linear.com/LTM8042







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