LT3667IUDD View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3667IUDD Datasheet PDF : 34 Pages
| |||
LT3667
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN1 = 12V unless otherwise noted. (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Switching Regulator
Switching Frequency
Minimum Switch Off-Time
RT = 37.4k
RT = 102k
RT = 487k
l 1.8
2.0
2.1
MHz
l 0.8 0.94 1.1
MHz
l 220 243 275
kHz
l
120 170
ns
Switch Current Limit (Note 7)
Switch VCESAT
DA Pin Current to Stop Switching
5% Duty Cycle, VIN = 5V, VFB1 = 0V
90% Duty Cycle, VIN = 5V, VFB1 = 0V
ISW = 200mA
l 600 750 950
mA
l 450 550 750
mA
300
mV
l 420 500 650
mA
Switch Leakage Current
Boost Schottky Diode Forward Voltage
Boost Schottky Diode Reverse Leakage
Minimum Boost Voltage (Note 8)
VSW = 0V
IBOOSTDIODE = 50mA, VIN = NC, VBOOST = 0V
VREVERSE = 12V, VIN = NC
l
0.05
2
µA
900
mV
0.04
4
µA
1.7
2.5
V
BOOST Pin Current
Feedback Voltage (FB1)
ISW = 200mA, VBOOST = 15V
10
16
mA
1.188 1.2 1.212
V
l 1.176 1.2 1.224
mV
FB1 Pin Bias Current
Pin Voltage = 1.2V
l
0.1
20
nA
Reference Voltage Line Regulation
SYNC High Level Input Voltage
SYNC Low Level Input Voltage
4.2V < VIN1 < 40V
0.001 0.005
%/V
l 1.2
l
V
0.5
V
SYNC Input Frequency
0.3
2.2
MHz
Each LDO Regulator
Minimum Input Voltage
ILOAD = 200mA
Feedback Voltage (FB2/FB3)
VIN = 2.2V, ILOAD = 1mA
2.2V < VIN < 15V, 1mA < ILOAD < 200mA
Load Regulation (Note 12)
VIN = 2.2V, ILOAD = 1mA to 200mA
Reference Voltage Line Regulation (Note 12)
2.2V < VIN2,3 < 45V
Dropout Voltage (Notes 9, 10), VIN = VOUT(NOMINAL)
ILOAD = 1mA
ILOAD = 1mA
ILOAD = 50mA
ILOAD = 50mA
ILOAD = 100mA
ILOAD = 100mA
ILOAD = 200mA
ILOAD = 200mA
GND Pin Current, VIN = VOUT(NOMINAL) + 0.6V
(Notes 10, 11)
ILOAD = 0mA
ILOAD = 50mA
ILOAD = 200mA
Quiescent Current IIN2 with LDO2 Disabled
VIN1 = 0V, VIN2 = 12V, VEN2/ILIM2 = 2V
Quiescent Current IIN3 with LDO3 Disabled (QFN)
VIN1 = 16V, VIN3 = 12V, VEN3/ILIM3 = 2V
Quiescent Current IIN3/BD with LDO3 Disabled (MSOP) VIN1 = 16V, VIN3/BD = 12V, VEN3/ILIM3 = 2V
FB2 Pin Bias Current (Note 12)
FB3 Pin Bias Current (Note 12)
VIN2 = 12V
VIN3 = 12V
Ripple Rejection (Note 12)
VIN – VOUT = 2V (Avg), VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD =200mA
l
1.6
2.2
V
792 800 808
mV
l 784
816
mV
l
0.2
5
mV
0.005 0.01
%/V
70
165
mV
l
210
mV
230 300
mV
l
400
mV
280 400
mV
l
450
mV
340 650
mV
l
750
mV
l
40
90
µA
l
1
2
mA
l
5
10
mA
13
20
µA
0.2
1
µA
1.2
2
µA
l
–3
±40
nA
l
–3
±40
nA
60
85
dB
3667fb
4
For more information www.linear.com/LT3667
Share Link: 