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参数资料
| 型号： | MAX1813 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 144-LQFP |
| 中文描述： | 动态可调、同步降压型控制器，集成电压定位电路 |
| 文件页数： | 13/38页 |
| 文件大小： | 738K |
| 代理商： | MAX1813 |
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M
Dynamically-Adjustable, Synchronous Step-Down
Controller with Integrated Voltage Positioning
______________________________________________________________________________________
13
Pin Description (continued)
PIN
NAME
FUNCTION
11
REF
+2.0V Reference Voltage Output. Bypass to GND with a 0.22
μ
F or greater capacitor. The reference
can sink and source
±
40
μ
A (min) for external loads. Loading REF degrades FB accuracy according to
the REF load regulation error.
12
ILIM
Current-Limit Adjustment. The PGND - VPCS current-limit threshold defaults to 50mV 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
500mV to 2.0V range. The logic threshold for switchover to the 50mV default value is approximately
V
CC
- 1V. Connect ILIM to REF for a fixed 200mV threshold.
13
PGOOD
Open-Drain Power-Good Output. PGOOD is normally high when the output is in regulation. If V
FB
is not
within a +10%/-12.5% window of the DAC setting, PGOOD is asserted low. During DAC code
transitions, PGOOD is forced high until 1 clock period after the slew-rate controller finishes the
transition. PGOOD is low in shutdown, undervoltage lockout, and during soft-start. Any fault condition
forces PGOOD low, and it remains low until the fault is cleared.
14
GND
Analog Ground
15
PGND
Power Ground. PGND is one of the inputs to the current-limit comparator.
16
DL
Low-Side Gate-Driver Output. DL swings from GND to V
DD
. DL is forced high when a fault occurs, and
at the end of the shutdown sequence.
17
V
DD
Supply Input for the DL Gate Drive. Connect to the system supply voltage (4.5V to 5.5V). Bypass to
PGND with a 1
μ
F or greater capacitor.
Suspend-Mode Control Input. When SUS is high, the suspend-mode VID code, as programmed by S0
and S1, is delivered to the DAC. SUS overrides ZMODE. Connect SUS to GND if the suspend-mode
multiplexer is not used. See Table 6.
18
SUS
19
ZMODE
Performance-Mode Mux Contol Input. If SUS is low, ZMODE selects between two different VID codes.
If ZMODE = GND with CODE = V
CC
, or ZMODE = V
CC
with CODE = GND, the VID code is set by the
logic-level voltages on D0
D4. When initially entering impedance mode, the VID code is determined
by the impedance at D0
D4. See Tables 5 and 7.
20
CODE
Code Select Input. CODE acts like another VID code input to select between the Intel Mobile Voltage
Position II (IMVP-II
) or Coppermine
VID codes. CODE also determines the polarity of the ZMODE
input. See Tables 5 and 7.
21
25
D4
D0
VID Code Inputs. D0 is the LSB and D4 is the MSB of the internal 5-bit DAC (see Tables 5 and 7). If
ZMODE = GND with CODE = V
CC
, or ZMODE = V
CC
with CODE = GND, D0
D4 are high-impedance
digital inputs, and the VID code is set by the logic-level voltages on D0
D4. When initially entering
impedance mode, the VID code is determined by the impedance at D0
D4 as follows:
Logic Low = source impedance is
≤
1k
±
5%
Logic High = source impedance is
≥
100k
±
5%.
Boost Flying-Capacitor Connection. Connect to an external capacitor and diode according to the
standard high-power application circuit (Figure 1). An optional resistor in series with BST allows DH
pullup current to be adjusted.
External Inductor Connection. Connect LX to the switched side of the inductor. LX serves as the lower
supply rail for the DH high-side gate driver. LX does not connect to the current-limit comparator.
26
BST
27
LX
28
DH
High-Side Gate Driver Output. DH swings from LX to BST.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1813EEI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1813EEI+ | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1813EEI+T | 功能描述:DC/DC 开关控制器 Dynamically Adjustable Synchronous Step-Down Controller w/Integrated Voltage Positioning RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1813EEI-T | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1813EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1813 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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