Datasheet

LTC3407-2
2
sn34072 34072fs
TOP VIEW
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
DD PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND
10
11
9
6
7
8
4
5
3
2
1
V
FB2
RUN2
POR
SW2
MODE/
SYNC
V
FB1
RUN1
V
IN
SW1
GND
V
IN
Voltages.................................................–0.3V to 6V
V
FB1
, V
FB2
, RUN1, RUN2
Voltages ..................................... –0.3V to V
IN
+ 0.3V
MODE/SYNC Voltage ...................... – 0.3V to V
IN
+ 0.3V
SW1, SW2 Voltage ......................... –0.3V to V
IN
+ 0.3V
POR Voltage ................................................–0.3V to 6V
ABSOLUTE AXI U RATI GS
W
WW
U
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, unless otherwise specified. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage Range ● 2.5 5.5 V
I
FB
Feedback Pin Input Current ● 30 nA
V
FB
Feedback Voltage (Note 3) 0°C ≤ T
A
≤ 85°C 0.588 0.6 0.612 V
–40°C ≤ T
A
≤ 85°C ● 0.585 0.6 0.612 V
∆V
LINE REG
Reference Voltage Line Regulation V
IN
= 2.5V to 5.5V (Note 3) 0.3 0.5 %/V
∆V
LOAD REG
Output Voltage Load Regulation (Note 3) 0.5 %
I
S
Input DC Supply Current
Active Mode V
FB1
= V
FB2
= 0.5V 700 950 µA
Sleep Mode V
FB1
= V
FB2
= 0.63V, MODE/SYNC = 3.6V 40 60 µA
Shutdown RUN = 0V, V
IN
= 5.5V, MODE/SYNC = 0V 0.1 1 µA
f
OSC
Oscillator Frequency V
FBX
= 0.6V ● 1.8 2.25 2.7 MHz
f
SYNC
Synchronization Frequency 2.25 MHz
I
LIM
Peak Switch Current Limit V
IN
= 3V, V
FBX
= 0.5V, Duty Cycle <35% 0.95 1.2 1.6 A
R
DS(ON)
Top Switch On-Resistance (Note 6) 0.35 0.45 Ω
Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω
I
SW(LKG)
Switch Leakage Current V
IN
= 5V, V
RUN
= 0V, V
FBX
= 0V 0.01 1 µA
Ambient Operating Temperature
Range (Note 2) ................................... – 40°C to 85°C
Junction Temperature (Note 5)............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
LTC3407-2EMSE only ...................................... 300°C
Reflow Peak Body Temperature ............................ 260°C
ORDER PART
NUMBER
DD PART MARKING
T
JMAX
= 125°C, θ
JA
= 45°C/W, θ
JC
= 10°C/W
LBFB
LTC3407EDD-2
PACKAGE/ORDER I FOR ATIO
UUW
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
MSE PART MARKING
T
JMAX
= 125°C, θ
JA
= 45°C/W, θ
JC
= 10°C/W
LTBDZ
LTC3407EMSE-2
TOP VIEW
1
2
3
4
5
V
FB1
RUN1
V
IN
SW1
GND
10
9
8
7
6
V
FB2
RUN2
POR
SW2
MODE/
SYNC
11
MSE PACKAGE
10-LEAD PLASTIC MSOP
MSE PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND