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参数资料
| 型号： | MAX1855 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | 数字信号处理 |
| 英文描述： | Fixed-Point Digital Signal Processor 352-FC/CSP 0 to 0 |
| 中文描述： | 高速、数字可调、同步降压型控制器，集成电压定位电路 |
| 文件页数： | 6/33页 |
| 文件大小： | 840K |
| 代理商： | MAX1855 |
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M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
6
_______________________________________________________________________________________
Note 2:
Output voltage accuracy specifications apply to DAC voltages from 0.6V to 2.0V. Includes load-regulation error.
Note 3:
When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error-com-
parator threshold by 50% of the ripple. In discontinuous conduction (
SKIP
= GND, light load), the output voltage will have a
DC regulation level higher than the trip level by approximately 1.5% due to slope compensation.
Note 4:
On-time and off-time specifications are measured from 50% to 50% at the DH pin, with LX forced to 0, BST forced to 5V, and
a 500pF capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be different
due to MOSFET switching speeds.
Note 5:
The MAX1854 does not have overvoltage protection.
Note 6:
Specifications to -40
°
C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= 5V,
SKIP
= V
CC
, VPS = PGND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 6)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Current-Limit Threshold
(Positive, Default)
V
ITH
V
PGND
- V
CS
, ILIM = V
CC
100
140
mV
V
ILIM
= 0.5V
V
ILIM
= 2V (REF)
35
160
65
240
Current-Limit Threshold
(Positive, Adjustable)
V
ITH
V
PGND
- V
CS
mV
V
CC
Undervoltage Lockout
Threshold
Rising edge, hysteresis = 20mV, switching
disabled below this level
4.0
4.45
V
VGATE Lower Trip Threshold
Measured at FB with respect to unloaded
output voltage, falling edge
-12.5
-7.5
%
VGATE Upper Trip Threshold
Measured at FB with respect to unloaded
output voltage, rising edge
7.5
12.5
%
VGATE Output Low Voltage
VGATE Leakage Current
GATE DRIVERS
DH Gate Driver On-Resistance
I
SINK
= 1mA
High state, forced to 5.5V
0.4
1
V
μ
A
R
ON D H
V
BST
- V
LX
forced to 5V
High state (pullup)
Low state (pulldown)
5
5
DL Gate Driver On-Resistance
R
ON(DL)
1.7
LOGIC AND I/O
Logic Input High Voltage
Logic Input Low Voltage
V
IH
V
IL
D0
D4,
SHDN
,
SKIP
D0
D4,
SHDN
,
SKIP
TON = V
CC
(200kHz operation)
TON = open (300kHz operation)
TON = REF (400kHz operation)
TON = GND (550kHz operation)
TON = GND or V
CC
SHDN
,
SKIP
= GND or V
CC
D0
D4 = GND
2.4
V
V
0.8
V
CC
- 0.4
3.15
1.65
3.85
2.35
0.5
3
1
10
TON Input Levels
V
-3
-1
3
Logic Input Current
μ
A
D0
D4 Pullup Current
μ
A
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1854EEG | High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning |
| MAX1855EEG | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA |
| MAX1854 | High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning |
| MAX1857EUA47 | 500mA, Low-Dropout, Ripple-Rejecting LDO in MAX |
| MAX1857 | Replaced by TMS320C6202B : Fixed-Point Digital Signal Processor 352-FCBGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1855EEG | 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 |
| MAX1855EEG+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1855EEG-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 |
| MAX1855EVKIT | 功能描述:DC/DC 开关控制器 Evaluation Kit for the MAX1716 MAX1854 MAX1855 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 |
| MAX1856EUB | 功能描述:电信线路管理 IC RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
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