LTC3428 Datasheet, PDF (2/12 Pages) Linear Technology – 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN

LTC3428
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN, V_OUT, SWA, SWB Voltage ....................... – 0.3 to 6V
SWA, SWB Voltage, Pulsed, <100ns ......................... 7V
SHDN, VC Voltage ......................................... – 0.3 to 6V
FB Voltage ................................... – 0.3 to (V_OUT + 0.3V)
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
PGNDA 1
SWA 2
V_OUT 3
SHDN 4
V_C 5
10 PGNDB
9 SWB
11
8 V_IN
7 AGND
6 FB
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
EXPOSED PAD MUST BE SOLDERED
TO GROUND PLANE ON PCB
T_JMAX = 125°C, θ_JA = 45°C/W,
θ_JC = 3°C/W
ORDER PART
NUMBER
LTC3428EDD
DD PART
MARKING
LBBG
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.3V, V_OUT = 5V unless otherwise noted.
PARAMETER
Minimum Startup Voltage
Quiescent Current, V_OUT
Quiescent Current, V_IN
Shutdown Current
Switching Frequency
FB Regulated Voltage
FB Input Current
Error Amp Transconductance
Output Adjust Voltage
NMOS Switch Leakage
NMOS Switch On Resistance
NMOS Current Limit
SHDN Input Threshold
SHDN Input Current
Maximum Duty Cycle
Minimum Duty Cycle
Current Limit Delay to Output
CONDITIONS
SHDN = V_IN
SHDN = V_IN
SHDN = 0V
Per Phase
V_FB = 1.24V
V_SWA, V_SWB = 5.5V, Per Phase
V_OUT = 5V, Per Phase
Per Phase
(Note 3)
MIN
● 0.8
● 1.219
1.6
●2
● 0.4
● 80
●
TYP
1.5
100
1.3
1.0
1.243
1
170
0.1
0.093
2.5
0.8
0.01
87
40
MAX
1.6
200
2.0
1
1.2
1.268
50
5.25
2.5
1.5
1
0
UNITS
V
µA
mA
µA
MHz
V
nA
µS
V
µA
Ω
A
V
µA
%
%
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3428E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Specification is guaranteed by design and not 100% tested in
production.
Note 4: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
3428f
2