參數(shù)資料
型號: LTC1266-3.3
廠商: Linear Technology Corporation
英文描述: Synchronous Switching Regulator Controller for N- or P-Channel MOSFETs(3.3V,同步穩(wěn)壓控制器(用于N或P溝道MOS場效應(yīng)管))
中文描述: 同步開關(guān)穩(wěn)壓控制器或P溝道MOSFET(3.3伏,同步穩(wěn)壓控制器(用于?馬鞍山或P溝道場效應(yīng)管)的N)
文件頁數(shù): 4/20頁
文件大?。?/td> 245K
代理商: LTC1266-3.3
4
LTC1266
LTC1266-3.3/LTC1266-5
SYMBOL
I
Q1
PARAMETER
V
IN
Pin DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
PWR V
IN
DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
Current Sense Threshold
(Burst Mode Operation Enabled)
LTC1266CS, LTC1266IS
LTC1266CS
LTC1266IS
LTC1266-3.3, LTC1266-5 (I and C)
LTC1266CS-3.3, LTC1266CS-5
LTC1266IS-3.3, LTC1266IS-5
Current Sense Threshold
(Burst Mode Operation Disabled)
LTC1266CS, LTC1266IS
LTC1266CS
LTC1266IS
LTC1266-3.3, LTC1266-5 (I and C)
LTC1266CS-3.3, LTC1266CS-5
LTC1266IS-3.3, LTC1266IS-5
Shutdown Pin Threshold
CONDITIONS
MIN
TYP
MAX
UNITS
3.5V < V
IN
< 18V
3.5V < V
IN
< 18V
V
SHUTDOWN
= 2.1V, 3.5V < V
IN
< 18V
2.1
170
25
3.3
260
60
mA
μ
A
μ
A
I
Q2
3.5V < PWR V
IN
< 18V
3.5V < PWR V
IN
< 18V
V
SHUTDOWN
= 2.1V, 3.5V < PWR V
IN
< 18V
V
BINH
= 0V
20
1
1
50
7
7
μ
A
μ
A
μ
A
V
SENSE1
V
SENSE–
= 3.3V, V
FB
= V
OUT
/2.64 + 25mV (Forced)
V
SENSE–
= 3.3V, V
FB
= V
OUT
/2.64 – 25mV (Forced)
V
SENSE–
= 3.3V, V
FB
= V
OUT
/2.64 – 25mV (Forced)
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
BINH
= 2.1V
25
155
155
25
155
155
mV
mV
mV
mV
mV
mV
135
135
180
190
135
135
180
190
V
SENSE2
V
SENSE–
3.3V, V
FB
= V
OUT
/2.64 + 25mV (Forced)
V
SENSE–
3.3V, V
FB
= V
OUT
/2.64 – 25mV (Forced)
V
SENSE–
3.3V, V
FB
= V
OUT
/2.64 – 25mV (Forced)
V
SENSE–
= V
OUT
+ 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
V
SENSE–
= V
OUT
– 100mV (Forced)
C Grade
I Grade
C
T
= 390pF, I
LOAD
= 700mA, C Grade
C
T
= 390pF, I
LOAD
= 700mA, I Grade
–20
155
155
–20
155
155
0.8
0.8
5
5
mV
mV
mV
mV
mV
mV
130
130
185
195
130
130
0.55
0.50
3.8
3.8
185
195
2
2
6.5
7.0
V
SHDN
V
V
t
OFF
Off-Time (Note 4)
μ
s
μ
s
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
T
J
= T
A
+ (P
D
×
110
°
C/W)
Note 3:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4:
In applications where R
SENSE
is placed at ground potential, the off-
time increases approximately 40%.
Note 5:
The LTC1266CS, LTC1266CS-3.3, LTC1266-5 and LTC1266ACS
are not tested and not quality assurance sampled at –40
°
C and 85
°
C.
These specifications are guaranteed by design and/or correlation. The
LTC1266IS, LTC1266IS-3.3, LTC1266IS-5 and LTC1266AIS are
guaranteed and tested over the –40
°
C to 85
°
C operating temperature
range.
Note 6:
Unless otherwise noted the specifications for the LTC1266A are
the same as those for the LTC1266.
Note 7:
t
r
and t
f
are measured at 10% and 90% levels.
–40
°
C < T
A
< 85
°
C (Note 5), V
IN
= 10V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
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