POWER LOSS (mW)
LT8335
Low I Boost/SEPIC/
Q
Inverting Converter
with 2A, 28V Switch
FEATURES DESCRIPTION
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3V to 25V Input Voltage Range The LT 8335 is a current mode DC/DC converter capable
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Ultralow Quiescent Current and Low Ripple Burst of generating either positive or negative output voltages
Mode Operation: I = 6A using a single feedback pin. It can be configured as a
Q
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2A, 28V Power Switch boost, SEPIC or inverting converter consuming as low as
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Positive or Negative Output Voltage Programming 6A of quiescent current. Low ripple Burst Mode opera-
with a Single Feedback Pin tion maintains high efficiency down to very low output
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Fixed 2MHz Switching Frequency currents while keeping the output ripple below 15mV in
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Programmable Undervoltage Lockout (UVLO) a typical application. The internally compensated current
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Internal Compensation and Soft-Start mode architecture results in stable operation over a wide
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Low Profile (0.75mm) 8-Lead (3mm 2mm) DFN range of input and output voltages. Integrated soft-start
Package and frequency foldback functions are included to control
inductor current during start-up. The 2MHz operation
combined with the small 8-lead DFN package, enables
APPLICATIONS
low cost, area efficient solutions.
n L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
Industrial and Automotive
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
n
Telecom property of their respective owners.
n
Medical Diagnostic Equipment
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Portable Electronics
TYPICAL APPLICATION
3V to 6V Input, 12V Boost Converter Efficiency and Power Loss
100 1000
1.2H
V
IN V
OUT
90
3V TO 6V 12V
275mA AT V = 3V
4.7F 80 800
IN
22F
EFFICIENCY
440mA AT V = 5V
IN
V SW
IN
520mA AT V = 6V 70
IN
EN/UVLO GND
60 600
LT8335
1M 4.7pF
50
POWER LOSS
FBX
40 400
INTV
CC
154k 30
1F
20 200
V = 3V
IN
V = 5V
IN
10
8335 TA01
V = 6V
IN
0 0
0 100 200 300 400 500 600
LOAD CURRENT (mA)
8335 TA01b
8335f
1
For more information www.linear.com/LT8335
EFFICIENCY (%)LT8335
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
TOP VIEW
SW ............................................................................28V
V , EN/UVLO ............................................................25V
IN FBX 1 8 EN/UVLO
EN/UVLO Pin Above V Pin ........................................6V
NC 2 7 INTV
IN 9 CC
GND
INTV (Note 2) ..........................................................4V SW 3 6 V
IN
CC
SW 4 5 GND
FBX ...........................................................................4V
Operating Junction Temperature (Note 3)
DDB PACKAGE
LT8335E, LT8335I ............................. 40C to 125C
8-LEAD (3mm 2mm) PLASTIC DFN
Storage Temperature Range .................. 65C to 150C = 80.5C/W
JA
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION