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參數(shù)資料
| 型號(hào)： | LT1507CS8-3.3 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 24-SO 0 to 70 |
| 中文描述： | 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 343K |
| 代理商： | LT1507CS8-3.3 |
19
LT1507
APPLICATIO
S I
FOR
ATIO
U
components. In many cases only C
C
is needed. Adding R
C
will improve phase margin, but this may necessitate the need
for C
F
to limit switching frequency ripple at the V
C
pin.
In Figure 10, full loop phase/gain characteristics are shown
with a compensation capacitor (C
C
) of 0.0033
μ
F, giving the
error amplifier a pole at 240Hz, with phase rolling off to 90
°
and staying there. The overall loop has a gain of 77dB at low
frequency rolling off to unity gain at 20kHz. Phase shows a
2-pole characteristic until the ESR of the output capacitor
brings it back above 10kHz. Phase margin is about 60
°
at
unity-gain.
Analog experts will note that around 1kHz, phase dips to
within 20
°
of the zero phase margin line. This is typical of
switching regulators because of the 2-pole rolloff generated
by the output capacitor and the compensation network. This
region of low phase is not a problem as long as it does not
occur near unity-gain. In practice, the variability of output
capacitor ESR tends to dominate all other effects with respect
to loop response. Variations in ESR will cause unity-gain to
W
U
U
move around, but at the same time phase moves with it so
that adequate phase margin is maintained over a very wide
range of ESR (
≥
5:1)
Undervoltage Lockout
See Application Information in LT1376 data sheet.
N8 0695
0.005
(0.127)
MIN
0.100
±
0.010
(2.540
±
0.254)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.130
±
0.005
(3.302
±
0.127)
0.015
(0.380)
MIN
0.018
±
0.003
(0.457
±
0.076)
0.125
(3.175)
MIN
1
2
3
4
8
7
6
5
0.255
±
0.015*
(6.477
±
0.381)
0.400*
(10.160)
MAX
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.325–0.015
+0.635
–0.381
8.255
(
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
FREQUENCY (kHz)
L
L
°
C
80
60
40
20
0
–20
200
150
100
50
0
–50
0.01
1
0.1
10
100
100
LT1511 F10
V
= 10V
V
OUT
= 5V, I
= 500mA
C
OUT
μ
F, 10V, AVX TPS
C
C
= 3.3nF, R
C
= 0
L = 10
μ
H
GAIN
PHASE
Figure 10. Overall Loop Phase and Gain
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Dimensions in inches (millimeters) unless otherwise noted.
PACKAGE DESCRIPTIO
N
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LT1507CS8PBF | 制造商:Linear Technology 功能描述:LT1507CS8PBF |
| LT1507G | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:1.5A GLASS PASSIVATED RECTIFIER |
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| LT1507IN8 | 功能描述:IC REG BUCK ADJ 1.5A 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1507IN8#PBF | 功能描述:IC REG BUCK ADJ 1.5A 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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