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参数资料
| 型号： | LT3433EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BST ADJ 0.5A 16TSSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3.3 V ~ 20 V |
| 输入电压： | 4 V ~ 60 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-TSSOP-EP |
LT3433
TYPICAL PERFOR A CE CHARACTERISTICS
1.1
1.0
0.9
Switch Resistance
vs Temperature (I SW = 500mA)
40
37
V BST Supply Switch Drive Current
vs Temperature (I SW = 500mA)
40
37
V OUT Supply Switch Drive Current
vs Temperature (I SW = 500mA)
0.8
0.7
R SWH
R SWL
34
31
34
31
0.6
0.5
28
28
0.4
–50 –25
0
25
50
75
100
125
25
–50
–25
0
25
50
75
100
125
25
–50
–25
0
25
50
75
100
125
TEMPERATURE ( ° C)
PI FU CTIO S
3433 G12
TEMPERATURE ( ° C)
3433 G13
TEMPERATURE ( ° C)
3433 G14
SGND (Pins 1, 8, 9, 16): Low Noise Ground Reference.
V BST (Pin 2): Boosted Switch Supply. This “boosted” sup-
ply rail is referenced to the SW_H pin. Supply voltage is
maintained by a bootstrap capacitor tied from the V BST pin
to the SW_H pin. A 1 μ F capacitor is generally adequate for
most applications.
The charge on the bootstrap capacitor is refreshed through
a diode, typically connected from the converter output
(V OUT ), during the switch-off period. Minimum off-time
operation assures that the boost capacitor is refreshed each
switch cycle. The LT3433 supports operational V BST sup-
ply voltages up to 75V (absolute maximum) as referenced
to ground.
SW_H (Pin 3): Boosted Switch Output. This is the current
return for the boosted switch and corresponds to the emitter
of the switch transistor. The boosted switch shorts the
SW_H pin to the V IN supply when enabled. The drive cir-
cuitry for this switch is boosted above the V IN supply
through the V BST pin, allowing saturation of the switch for
maximum efficiency. The “ON” resistance of the boosted
switch is 0.8 ? .
V IN (Pin 4): Input Power Supply. This pin supplies power
to the boosted switch and corresponds to the collector of
the switch transistor.This pin also supplies power to most
of the IC’s internal circuitry if the V BIAS pin is not driven
externally. This supply will be subject to high switching
transient currents so this pin requires a high quality bypass
capacitor that meets whatever application-specific input
ripple current requirements exist.
BURST_EN (Pin 5): Burst Mode Enable/Disable. When
this pin is below 0.3V, Burst Mode operation is enabled.
Pin input bias current < 1 μ A when Burst Mode operation
is enabled. If Burst Mode operation is not desired, pulling
this pin above 2V will disable the burst function. When
Burst Mode operation is disabled, typical pin input current
= 35 μ A. BURST_EN should not be pulled above 20V. This
pin is typically shorted to SGND for Burst Mode function,
or connected to either V BIAS or V OUT to disable Burst Mode
operation.
V C (Pin 6): Error Amplifier Output. The voltage on the V C
pin corresponds to the maximum switch current per oscil-
lator cycle. The error amplifier is typically configured as an
integrator circuit by connecting an RC network from this
pin to ground. This circuit typically creates the dominant
pole for the converter regulation feedback loop. Specific in-
tegrator characteristics can be configured to optimize tran-
sient response. See Applications Information.
3433f
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3433IFE | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3433IFE#PBF | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3433IFE#TR | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3433IFE#TRPBF | 功能描述:IC REG BUCK BST ADJ 0.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3433IFEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up/Down 60V TSSOP16 |
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