參數(shù)資料
型號(hào)： LT3507AHUHF#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PQCC38
封裝： 5 X 7 MM, LEAD FREE, PLASTIC, QFN-38
文件頁(yè)數(shù)： 23/28頁(yè)
文件大?。?/td> 372K
代理商： LT3507AHUHF#TRPBF
LT3507A
4
3507af
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN1, VIN2, VIN3 = 12V, VBOOST1, VBOOST2, VBOOST3 = 17V, unless
otherwise noted (Notes 2, 7)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Converter 3
VC3 to Switch Current Gain
4.3
A/V
Switch 3 Current Limit (Note 3)
Duty Cycle = 15%
l
2.7
3.3
4
A
Switch 3 VCESAT
ISW3 = 1.5A (Note 6)
350
500
mV
BOOST3 Operating Current
ISW3 = 1.5A
40
60
mA
LDO Regulator
Feedback Pin Voltage
l
788
800
812
mV
Feedback Pin Bias Current
–150
–500
nA
Error Amplifier Voltage Gain
1100
V/V
Line Regulation
VIN from 5V to 36V
0.05
%/V
Load Regulation
IDRIVE from 0.1mA to 10mA
0.005
%/mA
DRIVE Output Current Limit
l
10
15
22.5
mA
Dropout Voltage, VIN1 to DRIVE
IDRIVE = 10mA
1.7
2.0
V
Dropout Voltage, BIAS to DRIVE
IDRIVE = 10mA
0.5
0.8
V
Over/Undervoltage Lockout
Undervoltage Lockout Threshold
1.15
1.20
1.25
V
Overvoltage Lockout Threhold
1.15
1.20
1.25
V
Undervoltage Lockout Hysteresis Current
V(UVLO) < 1.2V
7
10
13
A
Overvoltage Lockout Hysteresis Current
V(OVLO) > 1.2V
–7
–10
–13
A
Input Bias Current (OVLO and UVLO)
–100
–200
nA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3507AE is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3507AI is guaranteed to meet performance specifications from –40°C
to 125°C junction temperature. The LT3507AH is guaranteed over the
full –40°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes. Operating lifetime is derated at
junction temperatures greater than 125°C.
Note 3: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Junction temperature will exceed the maximum operating range when
overtemperature protection is active. Continuous operation above the
specified maximum operating junction temperature may impair device
reliability.
Note 6: Switch VCESAT for the FE package is guaranteed by design and/or
correlation to static test.
Note 7: Positive currents flow into pins, negative currents flow out of pins.
Minimum and maximum specifications refer to absolute values.
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LT3507EUHF#2ESPBF 制造商:Linear Technology 功能描述:TRIPLE MONOLITHIC STEP-DOWN REGULATOR WITH LDO
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