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| 型号： | LT3500EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/28页 |
| 文件大小： | 322K |
| 描述： | IC REG DL BUCK/LINEAR 12-DFN |
| 标准包装： | 121 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 500kHz ~ 2.4MHz |
| 电压/电流 - 输出 1： | 0.8 V ~ 38.9 V，2A |
| 电压/电流 - 输出 2： | 可调式，13mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 3 V ~ 36 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN |
| 包装： | 管件 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
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LT3500
7
3500fc
TYPICAL PERFORMANCE CHARACTERISTICS
LDRV Dropout Voltage
vs Temperature
Inductor Value for 2A Maximum
Load Current (V
OUT1
= 3.3V,
I
RIPPLE
= 250mA)
V
IN
: The V
IN
pin powers the internal control circuitry and
is monitored by an undervoltage comparator. The V
IN
pin
is also connected to the collectors of the internal power
NPN switch and linear output NPN. The V
IN
pin has high
dI/dt edges and must be decoupled to ground close to
the pin of the device.
SHDN: The SHDN pin is used to shut down the LT3500
and reduce quiescent current to a typical value of
12糀. The accurate 0.76V threshold and input current
hysteresis can be used as an undervoltage lockout, prevent-
ing the regulator from operating until the input voltage has
reached a predetermined level. Force the SHDN pin above
its threshold or let it oat for normal operation.
SS: The SS pin is used to control the slew rate of the
output of both the switching and linear regulators. A
single capacitor from the SS pin to ground determines
the regulators ramp rate. For soft-start details see the
Applications Information section.
PG: The power good pin is an open-collector output that
sinks current when the FB or LFB falls below 90% of its
nominal regulating voltage. For V
IN
above 2V, its output
state remains true, although during SHDN, V
IN
undervoltage
lockout, or thermal shutdown, its current sink capability
is reduced
V
C
: The V
C
pin is the output of the error ampli er and the
input to the peak switch current comparator. It is normally
used for frequency compensation, but can also be used
as a current clamp or control loop override. If the error
ampli er drives V
C
above the maximum switch current
level, a voltage clamp activates. This indicates that the
output is overloaded and current to be pulled from the
SS pin reducing the regulation point.
R
T
/SYNC: This R
T
/SYNC pin provides two modes of setting
the constant switch frequency.
Connecting a resistor from the R
T
/SYNC pin to ground
will set the R
T
/SYNC pin to a typical value of 1V. The
resultant switching frequency will be set by the resistor
value. The minimum value of 15k?and maximum value
of 200k?set the switching frequency to 2.5MHz and
250kHz respectively.
Switcher Dropout Operation
TEMPERATURE (癈)
50
1.00
1.05
1.15
1.20
1.25
1.50
1.35
0
50 75
3500 G22
1.10
1.40
1.45
1.30
25
25
100 125 150
I
LDRV
= 5mA
INPUT VOLTAGE (V)
2.5
0
1
2
3
4
6
3.0
3.5 4.0 4.5
3500 G23
5.0 5.5
5
I
VOUT1
= 1A
T
A
= 25癈
V
VOUT1
= 5V
V
VOUT1
= 3.3V
INPUT VOLTAGE (V)
5
250
500
1000
1250
1500
25
2500
3500 G24
750
15
10
30 35
20
40
1750
2000
2250
L = 1.5糎
L = 2.2糎
L = 4.7糎
L = 6.8糎
L = 10糎
L = 3.3糎
L = 1糎
T
A
= 25癈
PIN FUNCTIONS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3500EDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| LT3500EMSE#PBF | 功能描述:IC REG DL BUCK/LINEAR 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LT3500EMSE#TRPBF | 功能描述:IC REG DL BUCK/LINEAR 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LT3500EMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
| LT3500EMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller |
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