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參數(shù)資料
| 型號： | LTC3536EMSE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, PDSO12 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 1088K |
| 代理商： | LTC3536EMSE#PBF |
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LTC3536
21
3536f
Figure 11. Compensated Error Amplifier Bode Plot
Figure 12. Complete Loop Bode Plot for Boost Operation Mode
A Bode plot of the error amplifier with the designed com-
pensation component values is shown in Figure 11. The
Bode plot confirms that the peak phase occurs at 37.8kHz
and the phase boost at that point is about 60°. In addition,
the gain at the peak phase frequency is 2dB which is close
to the design target.
APPLICATIONS INFORMATION
Figure 13. Complete Loop Bode Plot for
Buck-Boost Operation Mode
GAIN
(dB)
81
72
63
54
45
36
27
18
9
0
–9
–18
–27
–36
–45
–54
1
10
100
1k
10k
100k
FREQUENCY (Hz)
1M
10M
100M
–50
–60
–70
–80
–90
3536 F11
60
50
40
30
20
10
0
–10
–20
–30
–40
PHASE
GAIN
VO/VC
PHASE
(DEG)
The final step in the design process is to compute the Bode
plot for the entire loop using the designed compensation
network and confirm its phase margin and crossover
frequency. The complete loop Bode plot for this example
is shown in Figure 12. The loop crossover frequency is
37.8kHz which matches the design target and the phase
margin is approximately 60°.
The Bode plot for the complete loop should be checked
overall operating conditions and for variations in compo-
nent values to ensure that sufficient phase margin and
gain margin exists in all cases. The stability of the loop
should also be confirmed via time domain simulation and
by evaluating the transient response of the converter in
the actual circuit.
In this example the VIN varies from 1.8V to 5.5V. In buck-
boost operation (when 0.85 VOUT < VIN < VOUT/0.85) the
Bode plot of the complete loop shows a phase margin of
GAIN
(dB)
140
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
1
10
100
1k
10k
100k
FREQUENCY (Hz)
VO/VC
1M
10M
100M
–240
–260
–280
3536 F12
–40
–60
–80
–100
–120
–140
–160
–180
–200
–220
GAIN
PHASE
(DEG)
40° for VIN = VOUT = 3.3V. In fact in this mode of operation
the DC gain increase and often make this the most critical
region to compensate.
GAIN
(dB)
100
80
60
40
20
0
–20
–40
–60
–80
1
10
100
1k
10k
100k
FREQUENCY (Hz)
VO/VC
1M
10M
100M
–240
–270
3536 F13
0
–30
–60
–90
–120
–150
–180
–210
PHASE
GAIN
PHASE
(DEG)
相關(guān)PDF資料 |
PDF描述 |
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| LTC3536IMSE#PBF | 4 A SWITCHING REGULATOR, 1440 kHz SWITCHING FREQ-MAX, PDSO12 |
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| LTC3546EFE#PBF | DUAL SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PDSO28 |
| LTC3546EUFD#PBF | DUAL SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PQCC28 |
| LTC3546IUFD | DUAL SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PQCC28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3536IDD#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN 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:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3536IDD#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN 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:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3536IMSE#PBF | 功能描述:IC REG BUCK BST SYNC ADJ 12MSOP 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:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3536IMSE#TRPBF | 功能描述:IC REG BUCK BST SYNC ADJ 12MSOP 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:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3537 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO |
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