lt3571 Linear Technology Corporation, lt3571 Datasheet - Page 3

• Manufacturer Part Number: lt3571
• Description: 75v Dc/dc Converter For Apd Bias
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V
Switch Leakage Current
Schottky Forward Voltage
Schottky Reverse Leakage
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Bias Current
CTRL to FB Offset
CTRL Input Bias Current
APD Current Monitor Gain
Monitor Output Voltage Clamp
APD Monitor Voltage Drop
MONIN Pin Current Limit
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.
CESAT
CONDITIONS
R
R
R
R
SYNC = 300kHz Clock Signal, R
R
R
I
V
I
V
V
Current Out of Pin, V
250nA ≤ I
10μA ≤ I
V
V
SW
SCHOTTKY
T
T
T
T
T
T
SW
OUT
CTRL
MONIN
MONIN
= 12.1k
= 4.22k
= 56.2k
= 56.2k (250kHz)
= 12.1k (1MHz)
= 4.22k (2MHz)
= 200mA
= 75V
– V
= 0.5V
A
– V
= 40V, V
APD
SW
= 25°C, V
APD
= 200mA
APD,
= 75V
≤ 2.5mA, 20V < V
< 10μA, 10V < V
The
I
APD
APD
l
IN
= 0V
= 1mA
CTRL
denotes the specifi cations which apply over the full operating
= 3V, V
= 0.1V
Note 2: The LT3571E is guaranteed to meet specifi ed performance from
0°C to 125°C junction temperature. Specifi cations over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3571I is guaranteed to meet performance specifi cations over the –40°C
to 125°C operating junction temperature range.
MONIN
MONIN
SHDN
T
= 56.2k
= 3V, unless otherwise noted.
< 75V
< 75V
l
l
l
l
l
l
0.185
0.194
MIN
0.85
210
370
–10
1.7
1.5
4.8
–5
95
92
85
75
0.20
0.20
11.5
TYP
250
470
240
850
97
96
90
80
50
20
30
1
2
5
5
5
LT3571
0.215
0.206
MAX
1.15
280
570
100
2.3
0.4
5.2
65
15
20
2
5
UNITS
3
MHz
MHz
3571f
kHz
mA
mV
mV
mV
mV
mA
μA
μA
μA
nA
%
%
%
%
V
V
V
V