LT3959EUHE 查看數據表（PDF） - Linear Technology
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LT3959EUHE
Linear Technology
LT3959EUHE Datasheet PDF : 26 Pages
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LT3959
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, EN/UVLO = 12V, INTVCC = 4.75V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SYNC Input Low
l
0.4
V
SYNC Input High
l
1.5
V
SS Pull-Up Current
SS = 0V, Current Out of Pin
l
–14
–10.5
–7
µA
Low Dropout Regulators (DRIVE LDO and VIN LDO)
DRIVE LDO Regulation Voltage
DRIVE = 6V, Not Switching
l
4.6
4.75
4.9
V
VIN LDO Regulation Voltage
DRIVE = 0V, Not Switching
l
3.6
DRIVE LDO Current Limit
INTVCC = 4V
VIN LDO Current Limit
DRIVE = 0V, INTVCC = 3V
DRIVE LDO Load Regulation (∆VINTVCC/VINTVCC)
0 < IINTVCC < 20mA, DRIVE = 6V
–1
VIN LDO Load Regulation (∆VINTVCC/VINTVCC)
DRIVE = 0V, 0 < IINTVCC < 20mA
–1
DRIVE LDO Line Regulation [∆VINTVCC/(VINTVCC • ∆VIN)] 1.6V < VIN < 40V, DRIVE = 6V
VIN LDO Line Regulation [∆VINTVCC/(VINTVCC • ∆VIN)]
DRIVE = 0V, 5V < VIN < 40V
DRIVE LDO Dropout Voltage (VDRIVE – VINTVCC)
DRIVE = 4V, IINTVCC = 20mA
l
VIN LDO Dropout Voltage (VIN – VINTVCC)
VIN = 3V, DRIVE = 0V,
l
IINTVCC = 20mA
INTVCC Undervoltage Lockout Threshold Falling
l
1.85
INTVCC Undervoltage Lockout Threshold Rising
l
2.15
INTVCC Current in Shutdown
EN/UVLO = 0V
Logic
3.75
3.9
V
60
mA
60
mA
–0.6
%
–0.6
%
0.03
0.07
%/V
0.03
0.07
%/V
190
400
mV
190
400
mV
2.0
2.15
V
2.3
2.45
V
25
µA
EN/UVLO Threshold Voltage Falling
l
1.17
1.22
1.27
V
EN/UVLO Threshold Voltage Rising Hysteresis
20
mV
EN/UVLO Input Low Voltage
EN/UVLO Pin Bias Current Low
IVIN < 1μA
EN/UVLO = 1.15V
0.4
V
1.8
2.2
2.6
µA
EN/UVLO Pin Bias Current High
EN/UVLO = 1.30V
10
100
nA
FBX Power Good Threshold Voltage
FBX Overvoltage Threshold
PGOOD Output Low (VOL)
PGOOD Leakage Current
FBX > 0V, PGOOD Falling
FBX < 0V, PGOOD Falling
FBX > 0V, PGOOD Rising
FBX < 0V, PGOOD Rising
IPGOOD = 250µA
PGOOD = 40V
VFBX(REG) – 0.08
V
VFBX(REG) + 0.04
V
VFBX(REG) + 0.12
V
VFBX(REG) – 0.06
V
210
300
mV
1
µA
INTVCC Minimum Voltage to Enable PGOOD Function
INTVCC Minimum Voltage to Enable SYNC Function
l
2.5
2.7
2.9
V
l
2.5
2.7
2.9
V
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: For VIN below 4V, the EN/UVLO pin must not exceed VIN for proper
operation.
Note 3: The LT3959E is guaranteed to meet performance specifications
from the 0°C to 125°C operating 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 LT3959I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 4: The LT3959 is tested in a feedback loop which servos VFBX to the
reference voltages (1.6V and –0.8V) with the VC pin forced to 1.3V.
3959fa
4
For more information www.linear.com/LT3959
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