LTC1530IS8-1.9 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1530IS8-1.9 Datasheet PDF : 24 Pages
| |||
LTC1530
ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at –40°C ≤ TA ≤ 85°C. PVCC = 12V unless otherwise noted. (Note 3)
SYMBOL
VOUT
∆VOUT
IPVCC
fOSC
GERR
gmERR
IMAX
VSHDN
SRSS
tSS
tr, tf
t NOL
DCMAX
PARAMETER
Output Voltage
CONDITIONS
LTC1530IS8-1.9 (Note 4)
LTC1530IS8-2.5 (Note 4)
LTC1530IS8-2.8 (Note 4)
LTC1530IS8-3.3 (Note 4)
Output Load Regulation
Output Line Regulation
Operating Supply Current
Quiescent Current
Shutdown Supply Current
Internal Oscillator Frequency
Oscillator Valley Voltage
Oscillator Peak Voltage
Error Amplifier Open-Loop DC Gain
Error Amplifier Transconductance
IMAX Sink Current
IMAX Sink Current Tempco
Shutdown Threshold Voltage
Internal Soft-Start Slew Rate
Internal Soft-Start Wake-Up Time
Driver Rise and Fall Time
Driver Nonoverlap Time
Maximum G1 Duty Cycle
IOUT = 0 to 14A
VIN = 4.75V to 5.25V, IOUT = 0
Figure 3, VFB = 0V (Note 8)
Figure 3, COMP = 0.5V, VFB = 5V
Figure 3, COMP = 0 (Note 9)
Figure 4
VCOMP at 0% Duty Cycle
VCOMP at Max Duty Cycle
(Note 5)
(Note 5)
VIMAX = 5V
VIMAX = 5V
VIMAX = 5V
Figure 4, Measured at COMP Pin (Note 9)
Figure 4, COMP Pulls High, VFB = 0V
(Notes 9, 10)
Figure 4, COMP Pulls High to G1↑ (Note 10)
Figure 4
Figure 4
Figure 4
MIN TYP MAX
UNITS
1.881 1.9 1.919
V
q 1.862 1.9 1.938
V
2.475 2.5 2.525
V
q 2.450 2.5 2.550
V
2.772 2.8 2.828
V
q 2.744 2.8 2.856
V
3.267 3.3 3.333
V
q 3.234 3.3 3.366
V
–5
mV
±1
mV
15
mA
q
1.0
1.4
mA
q
45
80
µA
q 250
300
350
kHz
2.5
V
3.5
V
q 40
54
dB
q 1.6
2
2.8 millimho
170 200 230
µA
q 120
200
300
µA
3300
ppm/°C
q 100
180
mV
0.4
V/ms
3.5
ms
q
90
140
ns
q 30
100
ns
q 81
86
%
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: If IFB is taken below GND, it is clamped by an internal diode. This
pin handles input currents ≤ 100mA below GND without latch-up. In the
positive direction, it is not clamped to PVCC.
Note 3: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 4: The LTC1530 is tested in an op amp feedback loop which
regulates VSENSE or VOUT based on VCOMP = 2V for the error amplifier.
Note 5: The Open-loop DC gain and transconductance from the VFB pin to
the COMP pin are GERR and gmERR respectively. For fixed output voltage
versions, the actual open-loop DC gain and transconductance are GERR
and gmERR multiplied by the ratio 1.235/VOUT.
Note 6: The total voltage from the PVCC pin to the GND pin must be ≥ 8V
for the current limit protection circuit to be active.
Note 7: G1 and G2 begin to switch once PVCC is ≥ the undervoltage
lockout threshold voltage.
Note 8: Supply current in normal operation is dominated by the current
needed to charge and discharge the external FET gates. This current varies
with the LTC1530 operating frequency, supply voltage and the external
FETs used.
Note 9: The LTC1530 enters shutdown if COMP is pulled low.
Note 10: Slew rate is measured at the COMP pin on the transition from
shutdown to active mode.
3
Share Link: 