LTC3900E........................................... –40°C to 125°C
LTC3900I............................................ –40°C to 125°C
LTC3900H .......................................... –40°C to 150°C
LTC3900MP ....................................... –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/W
orDer inForMaTion
LEAD FREE FINISH
LTC3900ES8#PBF
LTC3900IS8#PBF
LTC3900HS8#PBF
LTC3900MPS8#PBF
LEAD BASED FINISH
LTC3900ES8
LTC3900IS8
LTC3900HS8
LTC3900MPS8
TAPE AND REEL
LTC3900ES8#TRPBF
LTC3900IS8#TRPBF
LTC3900HS8#TRPBF
LTC3900MPS8#TRPBF
TAPE AND REEL
LTC3900ES8#TR
LTC3900IS8#TR
LTC3900HS8#TR
LTC3900MPS8#TR
PART MARKING*
3900
3900
3900
3900
PART MARKING*
3900
3900
3900
3900
PACKAGE DESCRIPTION
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
PACKAGE DESCRIPTION
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
elecTrical characTerisTics
SYMBOL
V
CC
V
UVLO
I
VCC
Timer
V
TMR
I
TMR
Timer Threshold Voltage
Timer Input Current
PARAMETER
Supply Voltage Range
V
CC
Undervoltage Lockout Threshold
V
CC
Undervoltage Lockout Hysteresis
V
CC
Supply Current
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. (Notes 2, 3)
CONDITIONS
l
MIN
4.5
l
l
l
TYP
5
4.1
0.5
0.5
7
MAX
11
4.5
1
15
10%
–10
UNITS
V
V
V
mA
mA
V
µA
3900fb
Rising Edge
Rising Edge to Falling Edge
V
SYNC
= 0V
f
SYNC
= 100kHz, C
FG
= C
CG
= 4700pF (Note 4)
l
–10%
V
CC
/5
–6
V
TMR
= 0V
l
2
LTC3900
elecTrical characTerisTics
SYMBOL
t
TMRDIS
V
TMRMAX
Current Sense
I
CS
+
I
CS
–
V
CSMAX
V
CS
SYNC Input
I
SYNC
V
SYNCP
V
SYNCN
Driver Output
R
ONH
R
ONL
I
PK
t
d
t
SYNC
t
r
, t
f
Driver Pull-Up Resistance
I
OUT
= –100mA
LTC3900E/LTC3900I
LTC3900H/LTC3900MP
I
OUT
= 100mA
LTC3900E/LTC3900I
LTC3900H/LTC3900MP
(Note 6)
C
FG
= C
CG
= 4700pF, V
SYNC
= ±5V
LTC3900E/LTC3900I
LTC3900H/LTC3900MP
V
SYNC
= ±5V
C
FG
= C
CG
= 4700pF, V
SYNC
= ±5V
0.9
l
l
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. (Notes 2, 3)
PARAMETER
Timer Discharge Time
Timer Pin Clamp Voltage
CS
+
Input Current
CS
–
Input Current
CS
+
Pin Clamp Voltage
Current Sense Threshold Voltage
CONDITIONS
C
TMR
= 1000pF, R
TMR
= 4.7k
C
TMR
= 1000pF, R
TMR
= 4.7k
V
CS
+ = 0V
V
CS
– = 0V
I
IN
= 5mA, V
SYNC
= –5V
V
CS
– = 0V
LTC3900E/LTC3900I (Note 5)
LTC3900H/LTC3900MP (Note 5)
V
SYNC
= ±10V
(Note 6)
l
l
l
l
l
l
MIN
TYP
40
2.5
MAX
120
UNITS
ns
V
±1
±1
11
7.5
3
1
10.5
13.5
18
20
±10
1.8
–1.0
µA
µA
V
mV
mV
mV
µA
V
V
V
V
Ω
Ω
Ω
Ω
Ω
Ω
A
SYNC Input Current
SYNC Input Positive Threshold
SYNC Positive Input Hysteresis
SYNC Input Negative Threshold
SYNC Negative Input Hysteresis
l
l
±1
1.0
–1.8
1.4
0.2
–1.4
0.2
(Note 6)
1.2
1.6
2.0
1.2
1.6
2.0
Driver Pull-Down Resistance
0.9
l
l
Driver Peak Output Current
SYNC Input to Driver Output Delay
2
Switching Characteristics (Note 7)
l
l
l
60
75
15
120
150
ns
ns
ns
ns
Minimum SYNC Pulse Width
Driver Rise/Fall Time
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.
Note 2:
The LTC3900 is tested under pulsed load conditions such that
T
J
≈
T
A
. The LTC3900E is guaranteed to meet performance specifications
from 0°C to 85°C operating junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured
by design, characterization and correlation with statistical process
controls. The LTC3900I is guaranteed over the –40°C to 125°C operating
junction temperature range. The LTC3900H is guaranteed over the full
–40°C to 150°C operating junction temperature range. The LTC3900MP
is guaranteed and tested over the full –55°C to 150°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes; operating lifetime is derated for junction temperatures greater
than 125°C. Note that the maximum ambient temperature consistent
with these specifications is determined by specific operating conditions
in conjunction with board layout, the rated package thermal impedance
and other environmental factors. The junction temperature (T
J
, in °C) is
calculated from the ambient temperature (T
A
, in °C) and power dissipation
(P
D
, in watts) according to the formula:
T
J
= T
A
+ (P
D
•
θ
JA
), where
θ
JA
(in °C/W) is the package thermal
impedance.
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:
Supply current in normal operation is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with supply voltage, switching frequency and the external
MOSFETs used.
Note 5:
The current sense comparator threshold has a 0.33%/°C
temperature coefficient (TC) to match the TC of the external MOSFET
R
DS(ON)
.
Note 6:
Guaranteed by design, not subject to test.
Note 7:
Rise and fall times are measured using 10% and 90% levels. Delay
times are measured from ±1.4V at SYNC input to 20%/80% levels at the
LED专区
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
