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| LM3753 Datasheet, PDF (7/38 Pages) National Semiconductor (TI) – Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regulator Controller | |||
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Symbol Parameter
Conditions
EN
VEN-H
HIGH Level Input Voltage
VEN-L
LOW Level Input Voltage
VEN-TH
EN Threshold
VVIN = 4.5V to 18V, VVCC = 4.5V (Rising)
VVIN = 4.5V to 18V, VVCC = 4.5V (Falling)
VEN-HYS EN Threshold Hysteresis
IEN
EN Input Bias Current
VEN = 1.5V
VEN = 1.0V
Reference, Feedback & Error Amplifier: FB, COMP
VFB
VFB-REG1
VFB-REG2
FB Voltage Under Regulation
FB Voltage VIN Line Regulation
FB Voltage VCC Line Regulation
VCOMP = 1.8V
VVIN = 5.5V to 18V
VVCC = VVIN = VVDD = 4.5V to 5.5V (same
source)
IFB
VFB-PTH
FB Input Bias Current
FB Pin Master/Slave Programming
Threshold
AOL
DC Gain
fBW
Error Amplifier
Unity Gain Bandwidth
FB to COMP, VCOMP = VFB + 1.0V
RCOMP-SGND = 1.5 kâ¦, CCOMP-SGND = 50 pF
VCOMP-SLEW
VCOMP-REG
Error Amplifier Slew Rate
COMP Load Regulation, Sourcing VCOMP = 2.7V, ÎICOMP = +1 mA, DC Gain
= 40
PWM Ramp and Input Voltage Feed-Forward
DMAX
Maximum Duty Cycle Controlled by VVIN = 6V, VCOMP = 3.5V
Clock
DFF
Duty Cycle Controlled by VIN Feed- VVIN = 9V, VCOMP = 2.2V
Forward
tON-MIN
Minimum Controllable On-Time
VRAMP-MIN PWM Ramp Range
VRAMP-MAX
VRAMP
PWM Ramp Amplitude
Differential Amplifier: SNSP, SNSM, VDIF
Ramp Minimum
Ramp Maximum
VOS-INPUT Input Offset Voltage
VSNSP = 1.8V
RINPUT-SNSP Input Resistance of SNSP
AV-DIF
Gain
VSNSP = 0.6V to 3.6V
fBW-DIF
3dB Bandwidth
VDIF-REG1 VDIF Load Regulation, Sourcing VVDIF = 3.6V, IVDIF = 0.5 mA
VDIF-REG2 VDIF Load Regulation, Sourcing VVDIF = 0.6V, IVDIF = 0.5 mA
Current-Sense, Current Limit and Hiccup Mode: CS1, CS2, CSM, ILIM
VCS-OS
ICS
Current-Sense Input Offset Voltage VOUT = 1.8V
Range, VCS1(2) â VCSM
CS1, CS2 Input Bias Current
VCSM = 3.6V, VCS1(2) â VCSM = â15 mV and
+40 mV
VCSM = 0.6V, VCS1(2) â VCSM = â15 mV and
+40 mV
ICSM
CSM Input Source Bias Current
VCSM = 0.6V and 3.6V, VCS1(2) â VCSM = 40
mV
ICSL
CS1+ CS2 + CSM + ILIM Leakage VVCC = 0V, VEN = 0V, VCSM = VCS1 = VCS2
Current with Pre-Biased Output = VILIM = 3.6V
Min
1.51
1.26
1.14
0.593
81
0.996
â3
â3
â200
â450
Typ
1.39
1.25
140
0.1
0.4
0.599
±0.01
±0.15
45
3.2
70
15
6
â3
42
50
1.3
2.8
1.5
3
30
1
2
±2
150
0.1
Max Units
V
1.14
V
1.51
V
1.35
V
mV
µA
1.7
0.605 V
%
%
130
nA
V
dB
MHz
V/µS
mV
%
%
ns
V
V
V
1.004
mV
kâ¦
V/V
MHz
mV
mV
mV
200
nA
450
nA
240
µA
µA
7
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