ltc3824 Linear Technology Corporation, ltc3824 Datasheet - Page 3

• Manufacturer Part Number: ltc3824
• Description: High Voltage Step-down Controller With 40?a Quiescent Current
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
otherwise specifi ed.
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.
PARAMETER
V
Soft-Start Current I
V
V
SENSE Voltage at Burst Mode Operation
Current Limit Threshold (V
OSCILLATOR
Switching Frequency
Synchronization Pulse Threshold
on SYNC Pin
Synchronization Frequency Range
V
Minimum On-Time (Measured at GATE Pin)
Switching Frequency Foldback
GATE DRIVER
GATE Bias Voltage (V
GATE Bias Voltage (V
GATE High Voltage (V
GATE Peak Source Current
GATE Low Voltage (V
GATE Peak Sink Current
C
C
C
RSET
Threshold for Switching Off
Burst Mode Threshold
Burst Mode Threshold Hysteresis
SS
CC
CAP
DRIVER
CC
–V
–V
–GND)
CAP
DRIVER
CC
–V
–V
)
CAP
SENSE
)
)
)
CONDITIONS
V
V
V
(V
V
R
R
Rising Edge V
R
R
R
V
C
I
C
6V ≤ V
4V ≤ V
C
8V ≤ V
4V ≤ V
C
GATE
SS
CC
CC
CC
FB
CAP
CAP
GATE
GATE
SET
SET
SET
SET
SET
CC
< 0.4V
= 0.1V to 1.5V
≤ 60V
≤ 60V
≤ 60V
–V
= 392k
= 200k
= 392k
= 200k
= 392k
= 0.1μF , 9V ≤ V
= 0.1μF , 4V ≤ V
= 15mA
= 10nF
= 10nF
CC
CC
CC
CC
SENSE
A
≤ 8V, I
≤ 60V, I
≤ 60V, I
< 8V, I
= 25°C. V
) at 30% Duty Cycle
SYNC
GATE
GATE
The
70% Duty Cycle
GATE
GATE
CC
CC
= 15mA
= 10mA
l
CC
= –15mA
= 15mA
≤ 60V, I
≤ 8V, I
denotes the specifi cations which apply over the full operating
= 12V, R
Note 2: The LTC3824E is guaranteed to meet performance specifi cations
from 0°C to 85°C junction temperature. Specifi cations over the –40°C
to 85°C temperature range are assured by design characterization and
correlation with statistical process controls. The LTC3824I grade is
guaranteed over the full –40°C to 125°C operating junction temperature
range.
GATE
GATE
= 10mA
SET
= 10mA
= 392k, C
CAP
= 0.1μF . No load on any outputs, unless
●
●
●
●
●
●
●
●
●
●
MIN
170
340
230
460
7.0
6.8
0.2
80
35
0.04
0.85
TYP
100
200
400
200
0.9
1.3
1.2
7.9
0.3
2.5
0.3
2.5
30
20
50
5
LTC3824
MAX
120
230
460
300
600
0.4
8.6
1.5
2.8
0.8
0.5
65
UNITS
3824fb
3
kHz
kHz
kHz
kHz
kHz
mV
mV
mV
μA
ns
V
V
V
V
V
V
V
V
V
V
A
V
A