LT3470
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 10V, VSHDN = 10V, VBOOST = 15V, VBIAS = 3V unless otherwise specified.
PARAMETER
CONDITIONS
= 100mA
MIN
TYP
630
0.2
650
0.2
1.7
7
MAX
775
2
UNITS
mV
µA
mV
µA
V
Catch Schottky Drop
I
SH
Catch Schottky Reverse Leakage
Boost Schottky Drop
V
= 10V
SW
I
= 30mA
775
2
SH
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
V
= 10V, V
= 0V
BIAS
SW
●
2.2
12
5
I
= 100mA
mA
µA
V
SW
SHDN Pin Current
V
= 2.5V
1
SHDN
SHDN Input Voltage High
SHDN Input Voltage Low
2.5
0.2
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
Note 3: Bias current flows out of the FB pin.
of a device may be impaired.
Note 4: This is the minimum voltage across the boost capacitor needed to
Note 2: The LT3470E 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. The LT3470I specifications are
guaranteed over the –40°C to 125°C temperature range.
guarantee full saturation of the switch.
Note 5: This parameter is assured by design and correlation with statistical
process controls.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency, VOUT = 3.3V
Efficiency, VOUT = 5V
VFB vs Temperature
90
90
1.260
1.255
1.250
1.245
L = TOKO D52LC 47µH
L = TOKO D52LC 47µH
T
A
= 25°C
T
= 25°C
V
= 7V
A
IN
V
= 12V
IN
80
70
80
70
V
= 12V
= 24V
IN
V
= 36V
IN
V
IN
V
= 36V
V
= 24V
IN
IN
60
50
60
50
40
30
40
30
1.240
0.1
1
10
100
–50 –25
0
25
50
75 100 125
0.1
1
10
100
LOAD CURRENT (mA)
TEMPERATURE (°C)
LOAD CURRENT (mA)
3470 G02
3470 G01
3470 G03
3470f
3
Linear Systems [ Linear Systems ]
