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參數(shù)資料
| 型號： | MAX1717 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP |
| 中文描述： | 動態(tài)可調(diào)、同步降壓型控制器，用于筆記本CPU |
| 文件頁數(shù)： | 11/32頁 |
| 文件大?。?/td> | 501K |
| 代理商： | MAX1717 |
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M
Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
______________________________________________________________________________________
11
Pin Description (continued)
Boost Flying Capacitor Connection. Connect BST to the external boost diode and capacitor as shown in the
Standard Application Circuit
. An optional resistor in series with BST allows the DH pull-up current to be
adjusted (Figure 5).
BST
22
Inductor Connection. LX is the internal lower supply rail for the DH high-side gate driver. It also connects to
the current-limit comparator and the skip-mode zero-crossing comparator.
LX
23
High-Side Gate-Driver Output. DH swings LX to BST.
DH
24
DAC Code Inputs. D0 is the LSB and D4 is the MSB for the internal 5-bit DAC (see Table 4). When A/
B
is
high, D0–D4 function as high-input-impedance logic inputs. On the falling edge of A/
B
(or during power-up
with A/
B
low), the series resistance on each input sets its logic state as follows:
(series resistance
≤
1k
±5%) = logic low
(series resistance
≥
100k
±5%) = logic high
D4–D0
17–21
Internal MUX Select Input. When A/
B
is high, the DAC code is determined by logic-level voltages on D0–D4.
On the falling edge of A/
B
(or during power-up with A/
B
low), the DAC code is determined by the resistor
values at D0–D4.
A/
B
16
Supply Voltage Input for the DL Gate Driver, 4.5V to 5.5V. Bypass to GND with a 1μF capacitor.
V
DD
15
Low-Side Gate Driver Output. DL swings GND to V
DD
.
DL
14
2.0V Reference Output. Bypass to GND with 0.22μF (min) capacitor. Can source 50μA for external loads.
Loading REF degrades FB accuracy according to the REF load-regulation error.
REF
9
Current-Limit Adjustment. The GND - LX current-limit threshold defaults to 100mV if ILIM is tied to V
CC
. In
adjustable mode, the current-limit threshold voltage is 1/10th the voltage seen at ILIM over a 0.5V to 3.0V
range. The logic threshold for switchover to the 100mV default value is approximately V
CC
- 1V. Tie ILIM to
REF for a fixed 200mV threshold.
ILIM
10
Ground Remote-Sense Input. For nonvoltage-positioned circuits, connect GNDS to ground directly at the
load. GNDS internally connects to the integrator that fine tunes the output voltage. The output voltage rises
by an amount of GNDS - GND. For voltage-positioned circuits, increase the output voltage (24mV typ) by
biasing GNDS with a resistor-divider from REF to GND.
GNDS
11
Open-Drain Power-Good Output. VGATE is normally high when the output is in regulation. VGATE goes low
whenever the DAC code changes, and returns high one clock period after the slew-rate controller finishes
and the output is in regulation. VGATE is low in shutdown.
VGATE
12
Analog and Power Ground. Also connects to the current-limit comparator.
GND
13
On-Time Selection Control Input. This is a four-level input that sets the K factor (Table 3) to determine
DH on-time. Connect TON to the following pins for the indicated operation:
GND = 1000kHz
REF = 550kHz
Open = 300kHz
V
CC
= 200kHz
TON
8
PIN
FUNCTION
NAME
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1717EEG | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP |
| MAX1718EEI | Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II |
| MAX1718 | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP -40 to 85 |
| MAX1718BEEI | Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II |
| MAX1720EUTG | Switched Capacitor Voltage Inverter with Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX17175ETG+ | 制造商:Maxim Integrated Products 功能描述:BOOST REG W/INTEGRATED CHARGE PUMPS SWITCH CONTROL & HIGH-CU - Rail/Tube |
| MAX1717BEEG | 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 |
| MAX1717BEEG+ | 功能描述:DC/DC 開關(guān)控制器 Adj Synchronous Step-Down 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 |
| MAX1717BEEG+T | 功能描述:DC/DC 開關(guān)控制器 Adj Synchronous Step-Down 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 |
| MAX1717BEEG-T | 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 |
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