- 您现在的位置：买卖IC网 > PDF目录17279 > MAX17000EVKIT+ (Maxim Integrated Products)KIT EVAL FOR MAX17000 PDF资料下载
参数资料
| 型号： | MAX17000EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/32页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX17000 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 特殊用途 DC/DC，DDR 存储器电源 |
| 输出及类型： | 3，非隔离 |
| 功率 - 输出： | 19.8W |
| 输出电压： | 1.8V，0.9V，0.9V |
| 电流 - 输出： | 10A，2A，3mA |
| 输入电压： | 7 ~ 20 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX17000 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页当前第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
MAX17000
Complete DDR2 and DDR3 Memory
Power-Management Solution
( 2 LIR )
Valley Current-Limit Protection
The MAX17000 uses the same valley current-limit pro-
tection employed on all Maxim Quick-PWM controllers. If
the current exceeds the valley current-limit threshold,
the PWM controller is not allowed to initiate a new cycle.
The actual peak current is greater than the valley cur-
rent-limit threshold by an amount equal to the inductor
ripple current. Therefore, the exact current-limit charac-
teristic and maximum load capability are a function of
the inductor value and battery voltage. When combined
with the undervoltage-protection circuit, this current-limit
method is effective in almost every circumstance.
In forced-PWM mode, the MAX17000 also implements
a negative current limit to prevent excessive reverse
inductor currents when V OUT is sinking current. The
negative current-limit threshold is set to approximately
115% of the positive current limit. See Figure 5.
I PEAK
I LOAD
I LIMIT
I LIM(VAL) = I LOAD(MAX) 1-
PGOOD2 is the open-drain output for a window com-
parator that continuously monitors the VTT output.
PGOOD2 is actively held low in standby, shutdown,
and during soft-start. PGOOD2 becomes high imped-
ance as long as the VTT output voltage is within ±10%
of the regulation voltage. When the VTT output exceeds
the ±10% threshold, the MAX17000 pulls PGOOD2 low.
If PGOOD2 remains low for 5ms (typ), the MAX17000
latches off with the soft-shutdown sequence.
For logic-level output voltages, connect an external 100k Ω
pullup resistor from PGOOD1 and PGOOD2 to V DD .
POR, UVLO
Power-on reset (POR) occurs when V CC rises above
approximately 2V, resetting the fault latch and soft-start
circuit and preparing the controller for power-up. When
OVP is enabled, a rising edge on POR turns on the 16 Ω
discharge MOSFET on CSL and VTT. When OVP is dis-
abled, the internal 16 Ω discharge MOSFETs on CSL
and VTT also remain off.
V CC undervoltage lockout (UVLO) circuitry inhibits
switching until V CC reaches 4.1V (typ). When V CC rises
above 4.1V, the controller activates the PWM controller
and initializes soft-start. When V CC drops below the
UVLO threshold (falling edge), the controller stops, DL
is pulled low, and the internal 16 Ω discharge
MOSFETs on the CSL and VTT outputs are enabled, if
OVP is enabled.
Soft-Start and Soft-Shutdown
Soft-start and soft-shutdown for the MAX17000 PWM
0
TIME
block is voltage based. Soft-start begins when SHDN is
driven high. During soft-start, the PWM output is
Figure 5. Valley Current-Limit Threshold Point
Power-Good Outputs
(PGOOD1 and PGOOD2)
The MAX17000 features two power-good outputs.
PGOOD1 is the open-drain output for a window com-
parator that continuously monitors the SMPS output.
PGOOD1 is actively held low in shutdown and during
soft-start and soft-shutdown. After the soft-start termi-
nates, PGOOD1 becomes high impedance as long as
the SMPS output voltage is between 115% (typ) and
85% (typ) of the regulation voltage. When the SMPS
output voltage exceeds the 115%/85% regulation win-
dow, the MAX17000 pulls PGOOD1 low. Any fault con-
dition on the SMPS output forces PGOOD1 and
PGOOD2 low and latches off until the fault latch is
cleared by toggling SHDN or cycling V CC power below
1V. Detection of an OVP event immediately pulls
PGOOD1 low, regardless of the OVP state (OVP
enabled or disabled).
20
ramped up from 0V to the final set voltage in 1.4ms.
This reduces inrush current and provides a predictable
ramp-up time for power sequencing. The MAX17000
always uses skip mode during startup, regardless of
the SKIP and STDBY setting. The SKIP and STDBY con-
trols take effect after soft-start is done.
The MAX17000 VTT LDO regulator uses a current-limited
soft-start function. When the VTT block is enabled, the
internal source and sink current limits are linearly
increased from zero to the full-scale limit in 160μs. Full-
scale current limit is available when the VTT output is in
regulation, or after 160μs, whichever is earlier. The VTTR
reference buffer does not have any soft-start control.
Maxim Integrated
相关PDF资料 |
PDF描述 |
|---|---|
| RS3-4809DZ | CONV DC/DC 3W 20-60VIN +/-09VOUT |
| 100R08-305B | CABLE FLAT FLEX 8POS 1MM 12" |
| MAX8792EVKIT+ | KIT EVAL FOR MAX8792 |
| R1S-3.324 | CONV DC/DC 1W 3.3VIN 24VOUT |
| MC33996EKR2 | IC SWITCH 16-OTPT W/SPI 32-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17000EVKIT+ | 功能描述:电源管理IC开发工具 MAX17000 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17003AETJ+ | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003AETJ+T | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003ETJ+ | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| MAX17003ETJ+T | 功能描述:电压模式 PWM 控制器 Quad Out Main Power Supply Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。