LTC3422
2
3422fa
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum V
IN
Start-Up Voltage I
LOAD
< 1mA 0.88 1 V
Minimum V
IN
Operating Voltage (Note 3) ● 0.5 V
Output Voltage Adjust Range 2.25 5.25 V
● 2.40 5.25 V
Feedback Voltage ● 1.192 1.216 1.240 V
Feedback Input Current V
FB
= 1.216V 1 50 nA
Quiescent Current—Burst Mode Operation V
C
= 0V (Note 4) 25 42 µA
Quiescent Current—Shutdown SHDN = 0V, V
OUT
= 0V 0.1 1 µA
Quiescent Current—Active V
C
= 0V (Note 4) 0.75 1.1 mA
NMOS Switch Leakage 0.1 5 µA
PMOS Switch Leakage V
OUT
= 2V 0.1 10 µA
NMOS Switch On Resistance V
OUT
= 3.3V 0.20 Ω
PMOS Switch On Resistance V
OUT
= 3.3V 0.24 Ω
NMOS Current Limit—Steady State ● 1.5 A
NMOS Current Limit—Pulsed Duty Cycle Not to Exceed 5% 2 2.5 A
NMOS Current Limit—Short Circuit V
OUT
= 500mV, V
IN
= 2.5V 0.75 1.5 A
NMOS Burst Current Limit 600 mA
Maximum Duty Cycle ● 84 91 %
Minimum Duty Cycle ● 0%
Frequency ● 0.85 1 1.15 MHz
SYNC Input High ● 2.2 V
SYNC Input Low ● 0.8 V
SYNC Input Current 0.01 1 µA
V
IN
, V
OUT
, SYNC Voltages ........................... –0.3V to 6V
FB, SS, BURST, SHDN Voltages ................ – 0.3V to 6V
SW Voltage
DC .......................................................... – 0.3V to 6V
Pulsed < 100ns ...................................... – 0.3V to 7V
Operating Temperature Range
(Notes 2, 5)............................................. –40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
ORDER PART NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3422EDD
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 1.2V, V
OUT
= 3.3V, R
T
= 28k, unless otherwise noted. (Note 2)
TOP VIEW
11
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
V
OUT
SYNC
R
T
V
C
FB
SW
V
IN
BURST
SS
SHDN
DD PART MARKING
LBRN
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
