2
LT3439
sn3439 3439fs
(Note 1)
V
IN
Voltage ............................................................. 20V
COL A, COL B Voltage............................................. 35V
SHDN, SYNC Voltage.............................................. 20V
Maximum Junction Temperature ......................... 150°C
Operating Junction Temperature Range
(Note 2) ............................................ –40°C to 125°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LT3439EFE
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 5V; R
T
= 16.9k; C
T
= 680pF; R
SL
= 16.9k; COL A, COL B, SHDN pins open, unless otherwise noted.
T
JMAX
= 125°C, θ
JA
= 40°C/W
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
PGND
NC
COL A
R
SL
SYNC
C
T
R
T
NC
PGND
NC
COL B
V
IN
NC
SHDN
GND
NC
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3439E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls.
NOTE: BACKSIDE OF PACKAGE CONNECTED TO GND
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply and Shutdown
V
IN
Operating Range ● 2.8 17.5 V
V
IN(MIN)
Minimum Input Voltage 2.55 2.7 V
I
VIN
Supply Current 2.8V ≤ V
IN
≤ 17.5V ● 12 mA
I
VIN(SHDN)
Supply Current in Shutdown Mode 2.8V ≤ V
IN
≤ 17.5V, V
SHDN
= 0V 5 20 µA
V
SHDN(ON)
Shutdown Turn-On Threshold 2.8V ≤ V
IN
≤ 17.5V ● 1.3 1.4 V
V
SHDN(OFF)
Shutdown Turn-Off Threshold 2.8V ≤ V
IN
≤ 17.5V ● 1.20 1.26 V
I
SHDN
Shutdown Pin Current Hysteresis 2.8V ≤ V
IN
≤ 17.5V, V
SHDN
= 1.4V ● 10 20 40 µA
Oscillator and Sync
f
MAX
Oscillator Frequency ● 250 kHz
f
SYNC
Synchronization Frequency Range ● 300 kHz
V
SYNC
SYNC Pin Threshold ● 1.4 2.25 V
R
SYNC
SYNC Pin Input Resistance 40 kΩ
Output Switches (COL A, COL B)
DC Switch Duty Cycle ● 50 %
BV Output Switch Breakdown Voltage 2.8V ≤ V
IN
≤ 17.5V ● 35 50 V
R
ON
Output Switch On Resistance I
COLA
or I
COLB
= 0.75A ● 0.5 0.95 Ω
I
LIM(MAX)
Switch Current Limit 1.2 1.4 1.65 A
Slew Control
V
SLEWR
Output Voltage Slew Rising Edge Collector A or B 17 V/µs
V
SLEWF
Output Voltage Slew Falling Edge Collector A or B 17 V/µs
I
SLEWR
Output Current Slew Rising Edge Collector A or B 5 A/µs
I
SLEWF
Output Current Slew Falling Edge Collector A or B 5 A/µs
FE PART
MARKING
3439EFE
