参数资料
| 型号： | LT1930AES5#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 4/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1A TSOT23-5 |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.26 V ~ 34 V |
| 输入电压： | 2.45 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 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： | LT1930AES5 LT1930AES5#TRMCT LT1930AES5-ND |
LT1930/LT1930A
BLOCK DIAGRA
V IN 5
1.255V
REFERENCE
+
COMPARATOR
1 SW
A1
DRIVER
V OUT
R1 (EXTERNAL)
FB
–
R C
C C
Σ
A2
R
S
Q
+
Q1
0.01 ?
R2 (EXTERNAL)
RAMP
GENERATOR
–
SHUTDOWN
4 SHDN
3
FB
2 GND
OPERATIO
1.2MHz
OSCILLATOR*
Figure 2. Block Diagram
*2.2MHz FOR LT1930A
1930/A BD
The LT1930 uses a constant frequency, current-mode
control scheme to provide excellent line and load regula-
tion. Operation can be best understood by referring to the
block diagram in Figure 2. At the start of each oscillator
cycle, the SR latch is set, which turns on the power switch
Q1. A voltage proportional to the switch current is added
to a stabilizing ramp and the resulting sum is fed into the
positive terminal of the PWM comparator A2. When this
voltage exceeds the level at the negative input of A2, the SR
latch is reset turning off the power switch. The level at the
negative input of A2 is set by the error amplifier A1, and is
simply an amplified version of the difference between the
feedback voltage and the reference voltage of 1.255V. In
4
this manner, the error amplifier sets the correct peak
current level to keep the output in regulation. If the error
amplifier’s output increases, more current is delivered to
the output; if it decreases, less current is delivered. The
LT1930 has a current limit circuit not shown in Figure 2.
The switch current is constantly monitored and not al-
lowed to exceed the maximum switch current (typically
1.2A). If the switch current reaches this value, the SR latch
is reset regardless of the state of comparator A2. This
current limit helps protect the power switch as well as the
external components connected to the LT1930.
The block diagram for the LT1930A (not shown) is iden-
tical except that the oscillator frequency is 2.2MHz.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1930AES5TRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter 1A 2.2MHz Step-Up TSOT23 |
| LT1930ES5 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.45V to 16V 5-Pin TSOT-23 |
| LT1930ES5#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.45V to 16V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:IC STEP-UP DC/DC CONVERTER 5-SOT-23 制造商:Linear Technology 功能描述:IC, STEP-UP DC/DC CONVERTER, 5-SOT-23 制造商:Linear Technology 功能描述:IC, STEP-UP DC/DC CONVERTER, 5-SOT-23; Primary Input Voltage:16V; No. of Outputs:1; Output Voltage:34V; Output Current:480mA; No. of Pins:5; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LT1930ES5#TR | 功能描述:IC REG BOOST ADJ 1A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LT1930ES5#TRM | 功能描述:IC REG BOOST ADJ 1A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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