參數(shù)資料
型號: LM3311
廠商: National Semiconductor Corporation
元件分類: 基準電壓源/電流源
英文描述: Step-Up PWM DC/DC Converter with Integrated LDO, Op-Amp, and Gate Pulse Modulation Switch
中文描述: 升壓的PWM直流/直流集成穩(wěn)壓器,運算放大器和開關(guān)門脈沖調(diào)制器
文件頁數(shù): 16/29頁
文件大小: 2052K
代理商: LM3311
Typical Performance Characteristics
(Continued)
1.28MHz, 8.5V Application Boost Startup Waveform
LDO Load Transient Waveform
20126354
V
OUT
= 8.5V, V
IN
= 3.3V, C
OUT
= 20μF, R
LOAD
= 20
, C
SS
= open
1) V
SHDN
, 2V/div, DC
2) V
OUT
, 5V/div, DC
3) I
IN
, 1A/div, DC
T = 40μs/div
20126355
LDO
OUT
= 2.5V, LV
IN
= 5V, C
OUT
= 2.2μF
2) LDO
OUT
, 100mV/div, AC
3) I
LOAD
, 100mA/div, DC
T = 200μs/div
LDO Startup Waveform
(LV
IN
Fast Rising Edge)
LDO Startup Waveform
(LV
IN
Slow Rising Edge)
20126356
LDO
OUT
= 2.5V, LV
IN
= 5V, C
OUT
= 2.2μF, I
LOAD
= 300mA
1) LV
IN
, 5V/div, DC
2) LDO
OUT
, 1V/div, DC
T = 100μs/div
20126308
LDO
OUT
= 2.5V, LV
IN
= 5V, C
OUT
= 2.2μF, I
LOAD
= 300mA
1) LV
IN
, 5V/div, DC
2) LDO
OUT
, 1V/div, DC
T = 4ms/div
GPM Transient Waveforms
GPM Transient Waveforms
20126327
VGH = 20V, VDPM = 3.3V, C
= 4.7nF, R
= 2.4k
, C
E
= 33pF, R1 =
13k
, R2 = 1.2k
, VFLK at 50% duty cycle and 30kHz
1) VFLK, 2V/div, DC
3) VGHM, 5V/div, DC
T = 4μs/div
20126328
VGH = 20V, VDPM = 3.3V, C
= 4.7nF, R
= 750
, C
E
= 33pF, R1 =
13k
, R2 = 1.2k
, VFLK at 50% duty cycle and 64kHz
1) VFLK, 2V/div, DC
3) VGHM, 5V/div, DC
T = 2μs/div
L
www.national.com
16
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