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参数资料
| 型号： | LTC3405ES6#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ .3A SOT23-6 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 6 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 300mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-6 |
LTC3405
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
MODE, RUN, V FB Voltages ......................... – 0.3V to V IN
TOP VIEW
ORDER PART
NUMBER
SW Voltage .................................. – 0.3V to (V IN + 0.3V)
P-Channel Switch Source Current (DC) ............. 400mA
N-Channel Switch Sink Current (DC) ................. 400mA
RUN 1
GND 2
SW 3
6 MODE
5 V FB
4 V IN
LTC3405ES6
Peak SW Sink and Source Current .................... 630mA
Operating Temperature Range (Note 2) .. – 40 ° C to 85 ° C
Junction Temperature (Note 3) ............................ 125 ° C
Storage Temperature Range ................ – 65 ° C to 150 ° C
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T JMAX = 125 ° C, θ JA = 250 ° C/ W
S6 PART MARKING
LTXQ
Lead Temperature (Soldering, 10 sec)................. 300 ° C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 ° C.
V IN = 3.6V unless otherwise specified.
SYMBOL
I VFB
I PK
PARAMETER
Feedback Current
Peak Inductor Current
CONDITIONS
V IN = 3V, V FB = 0.7V, Duty Cycle < 35%
●
MIN
375
TYP
500
MAX
± 30
625
UNITS
nA
mA
V FB
? V OVL
? V FB
Regulated Feedback Voltage
? Output Overvoltage Lockout
Reference Voltage Line Regulation
(Note 4)
? V OVL = V OVL – V FB
V IN = 2.5V to 5.5V (Note 4)
●
●
●
0.784
20
0.8
50
0.04
0.816
80
0.4
V
mV
%/V
V LOADREG
Output Voltage Load Regulation
0.5
%
V IN
Input Voltage Range
●
2.5
5.5
V
I S
Input DC Bias Current
(Note 5)
Pulse Skipping Mode
Burst Mode ? Operation
Shutdown
V FB = 0.7V, Mode = 3.6V, I LOAD = 0A
V FB = 0.83V, Mode = 0V, I LOAD = 0A
V RUN = 0V, V IN = 4.2V
300
20
0.1
400
35
1
μ A
μ A
μ A
f OSC
Oscillator Frequency
V FB = 0.8V
●
1.2
1.5
1.8
MHz
V FB = 0V
210
kHz
R PFET
R NFET
I LSW
R DS(ON) of P-Channel FET
R DS(ON) of N-Channel FET
SW Leakage
I SW = 100mA
I SW = –100mA
V RUN = 0V, V SW = 0V or 5V, V IN = 5V
0.7
0.6
± 0.01
0.85
0.90
± 1
?
?
μ A
V RUN
I RUN
V MODE
I MODE
RUN Threshold
RUN Leakage Current
MODE Threshold
MODE Leakage Current
●
●
●
●
0.3
0.3
1
± 0.01
1.5
± 0.01
1.5
± 1
2
± 1
V
μ A
V
μ A
Burst Mode is a registered trademark of Linear Technology Corporation.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3405E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
LTC3405: T J = T A + (P D )(250 ° C/W)
Note 4: The LTC3405 is tested in a proprietary test mode that connects
V FB to the output of the error amplifier.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
3405fa
2
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