Datasheet

LTC3428
2
3428fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V
IN
, V
OUT
, SWA, SWB Voltage ........................ –0.3 to 6V
SWA, SWB Voltage, Pulsed, <100ns ...........................7V
SHDN, V
C
, FB Voltage .................................... –0.3 to 6V
Operating Temperature Range (Note 2)....–40°C to 85°C
Storage Temperature Range ...................–65°C to 125°C
(Note 1)
TOP VIEW
DD PACKAGE
10-LEAD (3mm s 3mm) PLASTIC DFN
EXPOSED PAD MUST BE SOLDERED
TO GROUND PLANE ON PCB
10
9
6
7
8
4
5
3
2
1
PGNDB
SWB
V
IN
AGND
FB
PGNDA
SWA
V
OUT
SHDN
V
C
11
T
JMAX
= 125°C, θ
JA
= 45°C/W
θ
JC
= 3°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3428EDD#PBF LTC3428EDD#TRPBF LBBG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3428EDD LTC3428EDD#TR LBBG
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Startup Voltage 1.5 1.6 V
Quiescent Current, V
OUT
Quiescent Current, V
IN
SHDN = V
IN
SHDN = V
IN
100
1.3
200
2.0
µA
mA
Shutdown Current SHDN = 0V 1 µA
Switching Frequency Per Phase
l
0.8 1.0 1.2 MHz
FB Regulated Voltage
l
1.219 1.243 1.268 V
FB Input Current V
FB
= 1.24V 150 nA
Error Amp Transconductance 170 µS
Output Adjust Voltage 1.6 5.25 V
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 3.3V, V
OUT
= 5V unless otherwise noted.