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参数资料
| 型号： | LTC3545IUD-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.8A 16QFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LTC3545/LTC3545-1
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = PV IN = 3.6V unless otherwise noted. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V LOADREG
I FBx
I S
Output Voltage Load Regulation (Notes 5, 6)
Feedback Pin Leakage (Note 5)
Input DC Bias Current (All Regulators Enabled)
I LOAD = 0A, 2.25MHz
0.5
80
%
nA
Pulse Skip (Active Mode)
Burst Mode Operation (All Regulators Sleeping)
Shutdown (RUN X = 0V)
V FBx = 0.5V
V FBx = 0.7V
680
58
0.1
750
70
2.0
μA
μA
μA
f OSC
Oscillator Frequency
●
1.8
2.25
2.7
MHz
f SYNC
Synchronization Frequency
LTC3545 Only
●
1
3
MHz
V RUN(HIGH)
V RUN(LOW)
RUNx Input High Voltage
RUNx Input Low Voltage
●
●
1
0.3
V
V
I RUNx
RUN Leakage Current
±0.1
±1
μA
I LSWx
I SYNC
SWx Leakage
SYNC Leakage
V RUNx = 0V, V SWx = 0V or 5.5V, V IN = 5.5V
V RUN = 0V, V SYNC = 0V or 5.5V,
±0.1
±0.1
±1
±1
μA
μA
V IN = 5.5V
T PGOODx
Power Good Threshold–Deviation From V FB
Steady State (0.6V)
V FBx Ramping Up
V FBx Ramping Down
–7.5
–10
%
%
R PGOODx
Power Good Pull-Down On-Resistance
I PGD = 50mA
●
14
50
Ω
MODE/SYNC Thresholds
Individual Regulator Characteristics (One Regulator Enabled)
0.93
V
t SS
I PK
Soft-Start Period
Peak Switch Current Limit
V FBx = 10% to 90% Fullscale
1
850
1.3
1100
1.6
μs
A
I Q
Input DC Bias Current
I LOAD = 0A, 2.25MHz
Pulse Skip (Active Mode)
Burst Mode Operation (Sleeping)
V FBx = 0.5V
V FBx = 0.7V
310
31
μA
μA
R PFET
R NFET
R DS(ON) of P-Channel FET (Note 7)
R DS(ON) of N-Channel FET (Note 7)
I SWx = 100mA
I SWx = –100mA
0.35
0.35
Ω
Ω
V UVLO
Undervoltage Lockout
(High V CC to Low)
●
1.8
2.25
V
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 LTC3545E/LTC3545E-1 are guaranteed to meet performance
speci?cations from 0°C to 85°C. Speci?cations over the –40°C to
125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3545I/LTC3545I-1 are guaranteed to meet performance speci?cations
over the full –40°C to 125°C operating junction temperature range.
Note 3: 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 )(68°C/W)
This IC includes overtemperature protection that is intended to protect
will exceed 125°C when overtemperature is active. Continuous operation
above the speci?ed maximum operating junction temperature may impair
device reliability.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature is active.
Continuous operation above the speci?ed maximum operating junction
temperature may impair device reliability.
Note 5: The LTC3545/LTC3545-1 are tested in a proprietary test mode that
connects V FB to the output of the error ampli?er.
Note 6: Load regulation is inferred by measuring the regulation loop gain.
Note 7: The QFN switch-on resistance is guaranteed by correlation to
water level measurements.
Note 8: Guaranteed by long-term current density limitations.
the device during momentary overload conditions. Junction temperature
35451fb
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3545IUD-1-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3545IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3545IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3546 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator |
| LTC3546EFE#PBF | 功能描述:IC REG BUCK SYNC ADJ DL 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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