LTC1530CS8 Linear Technology, LTC1530CS8 Datasheet - Page 3

• Manufacturer Part Number: LTC1530CS8
• Description: IC SW REG CNTRLR SYNC ADJ 8-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1530CS8

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.3 ~ 3.5 V
• Current - Output: 20A
• Frequency - Switching: 300kHz
• Voltage - Input: 3.3V, 5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
SYMBOL
V
I
f
G
g
I
V
SR
t
t
t
DC
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: If I
pin handles input currents 100mA below GND without latch-up. In the
positive direction, it is not clamped to PV
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 V
Note 5: The Open-loop DC gain and transconductance from the V
the COMP pin are G
versions, the actual open-loop DC gain and transconductance are G
and g
PVCC
OSC
MAX
SS
r
NOL
mERR
OUT
SHDN
V
ERR
, t
OUT
SS
MAX
f
mERR
FB
SENSE
multiplied by the ratio 1.235/V
is taken below GND, it is clamped by an internal diode. This
PARAMETER
Output Voltage
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
I
I
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
MAX
MAX
or V
ERR
Sink Current
Sink Current Tempco
OUT
and g
based on V
mERR
respectively. For fixed output voltage
COMP
CC
OUT
= 2V for the error amplifier.
.
.
A
= 25 C. PV
CONDITIONS
LTC1530IS8-1.9 (Note 4)
LTC1530IS8-2.5 (Note 4)
LTC1530IS8-2.8 (Note 4)
LTC1530IS8-3.3 (Note 4)
I
V
Figure 3, V
Figure 3, COMP = 0.5V, V
Figure 3, COMP = 0 (Note 9)
Figure 4
V
V
(Note 5)
(Note 5)
V
V
V
Figure 4, Measured at COMP Pin (Note 9)
Figure 4, COMP Pulls High, V
(Notes 9, 10)
Figure 4, COMP Pulls High to G1 (Note 10)
Figure 4
Figure 4
Figure 4
OUT
IN
COMP
COMP
IMAX
IMAX
IMAX
CC
= 4.75V to 5.25V, I
= 0 to 14A
= 5V
= 5V
= 5V
= 12V unless otherwise noted. (Note 3)
at 0% Duty Cycle
at Max Duty Cycle
FB
ERR
The
pin to
FB
= 0V (Note 8)
denotes specifications that apply over the full operating temperature
OUT
Note 6: The total voltage from the PV
for the current limit protection circuit to be active.
Note 7: G1 and G2 begin to switch once PV
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.
FB
= 0
= 5V
FB
= 0V
1.881
1.862
2.475
2.450
2.772
2.744
3.267
3.234
MIN
250
170
120
100
1.6
40
30
81
CC
pin to the GND pin must be 8V
CC
3300
TYP
300
200
200
180
100
is the undervoltage
1.9
1.9
2.5
2.5
2.8
2.8
3.3
3.3
1.0
2.5
3.5
0.4
3.5
– 5
15
45
54
90
86
2
1
LTC1530
1.938
2.525
2.550
2.828
2.856
3.333
3.366
1.919
MAX
350
230
300
140
1.4
2.8
80
millimho
ppm/ C
UNITS
1530fa
V/ms
3
kHz
mV
mV
mA
mA
mV
ms
dB
ns
ns
%
V
V
V
V
V
V
V
V
A
V
V
A
A