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| 型号： | LTC1266ACS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM 16-SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 400kHz |
| 占空比： | 100% |
| 电源电压： | 3.5 V ~ 18 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC1266
LTC1266-3.3/LTC1266-5
ELECTRICAL CHARACTERISTICS
– 40 ° C < T A < 85 ° C (Note 5), V IN = 10V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I Q1
V IN Pin DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
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
PWR V IN DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
3.5V < PWR V IN < 18V
3.5V < PWR V IN < 18V
V SHUTDOWN = 2.1V, 3.5V < PWR V IN < 18V
20
1
1
50
7
7
μ A
μ A
μ A
V SENSE1
Current Sense Threshold
V BINH = 0V
(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
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)
135
135
135
135
25
155
155
25
155
155
180
190
180
190
mV
mV
mV
mV
mV
mV
V SENSE2
Current Sense Threshold
V BINH = 2.1V
(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
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)
130
130
130
130
–20
155
155
–20
155
155
185
195
185
195
mV
mV
mV
mV
mV
mV
V SHDN
t OFF
Shutdown Pin Threshold
Off-Time (Note 4)
C Grade
I Grade
C T = 390pF, I LOAD = 700mA, C Grade
C T = 390pF, I LOAD = 700mA, I Grade
0.55
0.50
3.8
3.8
0.8
0.8
5
5
2
2
6.5
7.0
V
V
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%.
4
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.
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