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參數(shù)資料
| 型號(hào)： | MAX1540A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator |
| 中文描述： | 雙路、降壓型控制器，帶有電感飽和保護(hù)、動(dòng)態(tài)輸出和線性穩(wěn)壓器 |
| 文件頁數(shù)： | 17/49頁 |
| 文件大?。?/td> | 794K |
| 代理商： | MAX1540A |
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M
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
______________________________________________________________________________________
17
PIN
MAX1540A
MAX1541
NAME
FUNCTION
6
8
ILIM1
Valley Current-Limit Threshold Adjustment for Controller 1. The valley current-limit
threshold defaults to 50mV if ILIM1 is tied to V
CC
. In adjustable mode, the valley
current-limit threshold across CSP1 and CSN1 is precisely 1/10 the voltage seen at
ILIM1 over a 250mV to 2.5V range. The logic threshold for switchover to the 50mV
default value is approximately V
CC
- 1V. When the inductor-saturation protection
threshold is exceeded, ILIM1 sinks 6μA. See the
Current-Limit Protection
section.
7
9
ILIM2
Valley Current-Limit Threshold Adjustment for Controller 2. The valley current-limit
threshold defaults to 50mV if ILIM2 is tied to V
CC
. In adjustable mode, the valley
current-limit threshold across CSP2 and CSN2 is precisely 1/10th the voltage seen at
ILIM2 over a 250mV to 2.5V range. The logic threshold for switchover to the 50mV
default value is approximately V
CC
- 1V. When the inductor-saturation protection
threshold is exceeded, ILIM2 sinks 6μA. See the
Current-Limit Protection
section.
8
10
REF
2.0V Reference Voltage Output. Bypass REF to analog ground with a 0.1μF or greater
ceramic capacitor. The reference can source up to 50μA for external loads. Loading
REF degrades output voltage accuracy according to the REF load-regulation error.
The reference is disabled when the MAX1540A/MAX1541 are shut down.
—
11
REFIN1
External Reference Input for Controller 1. REFIN1 sets the main feedback regulation
voltage (V
FB1
= V
REFIN1
) of the MAX1541.
—
12
OD
Open-Drain Output. Controlled by GATE.
9
13
CSP2
Positive Current-Sense Input for Controller 2. Connect to the positive terminal of the
current-sense element. Figure 14 and Table 9 describe several current-sensing
options. The PWM controller does not begin a cycle unless the current sensed is less
than the valley current-limit threshold programmed at ILIM2.
10
14
CSN2
Negative Current-Sense Input for Controller 2. Connect to the negative terminal of the
current-sense element. Figure 14 and Table 9 describe several current-sensing
options. The PWM controller does not begin a cycle unless the current sensed is less
than the valley current-limit threshold programmed at ILIM2.
11
15
FB2
Feedback Input for Controller 2:
M AX 1540A: C onnect to V
C C
for a + 1.5V fi xed outp ut or to anal og g ound ( G N D for a
+ 2.5V fi xed outp ut. For an ad ustab e outp ut ( 0.7V to 5.5V connect FB2 to a r esi sti ve
d vi d er fr om OU T2. The FB2 r eg ul ati on l evel i s + 0.7V
M AX 1541: C onnect to V
C C
for a + 1.8V fi xed outp ut or to anal og g ound ( G N D for a
+ 2.5V fi xed outp ut. For an ad ustab e outp ut ( 0.7V to 5.5V connect FB2 to a r esi sti ve
d vi d er fr om OU T2. The FB2 r eg ul ati on l evel i s + 0.7V
Output Voltage-Sense Connection for Controller 2. Connect directly to the positive
terminal of the output capacitors as shown in the standard application circuits
(Figures 1 and 12). OUT2 senses the output voltage to determine the on-time for the
high-side switching MOSFET. OUT2 also serves as the feedback input when using
the preset internal output voltages as shown in Figure 10. When discharge mode is
enabled by OVP/UVP, the output capacitor is discharged through an internal 10
Ω
resistor connected between OUT2 and ground.
12
16
OUT2
Pin Description (continued)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1540AETJ+ | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540AETJ+T | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ+ | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| MAX1540ETJ+T | 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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