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| 型号： | MAX17080EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/48页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX17080 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 3，非隔离 |
| 输入电压： | 4 ~ 26 V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX17080 |
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AMD 2-/3-Output Mobile Serial
VID Controller
1
2
3
4
5
6
DC_IN
V DDIO
SVC/SVD
2-BIT BOOT VID
SERIAL MODE
BUS IDLE
SHDN
GNDS1 OR GNDS2
(VDD_PLANE_STRAP)
SMPS V OUT
7
PWRGD
20 μ s
10 μ s
BLANK
HIGH-Z
20 μ s
PGD_IN
RESET_L
8
Figure 7. Startup Sequence
NB SMPS Current Sense
The NB current sense is achieved by sensing the volt-
age across the high-side internal MOSFET during the
on-time. The current information is computed by dividing
the sensed voltage by the MOSFET’s on-resistance,
R ON(NH3) .
Combined-Mode Current Balance
When the core SMPSs are configured in combined
mode (GNDS1 or GNDS2 pulled to V DDIO ), the
MAX17080 current-mode architecture automatically
forces the individual phases to remain current bal-
anced. SMPS1 is the main voltage-control loop, and
SMPS2 maintains the current balance between the
See the Core Peak Inductor Current Limit (ILIM12) sec-
tion in the Core SMPS Design Procedure section.
Power-Up Sequence (POR, UVLO, PGD_IN)
Power-on reset (POR) occurs when V CC rises above
approximately 3V, resetting the fault latch and prepar-
ing the controller for operation. The V CC undervoltage-
lockout (UVLO) circuitry inhibits switching until V CC
rises above 4.25V (typ). The controller powers up the
reference once the system enables the controller V CC
above 4.25V and SHDN is driven high. With the refer-
ence in regulation, the controller ramps the SMPS and
NB voltages to the boot voltage set by the SVC and
SVD inputs:
phases. This control scheme regulates the peak induc-
tor current of each phase, forcing them to remain prop-
erly balanced. Therefore, the average inductor current
t START =
V BOOT
( 1 mV /μ s )
variation depends mainly on the variation in the current-
sense element and inductance value.
Peak Current Limit
The MAX17080 current-limit circuit employs a fast peak
inductor current-sensing algorithm. Once the current-
sense signal of the SMPS exceeds the peak current-limit
threshold, the PWM controller terminates the on-time.
The soft-start circuitry does not use a variable current
limit, so full output current is available immediately.
PWRGD becomes high impedance approximately 20μs
after the SMPS outputs reach regulation. The boot VID
is stored the first time PWRGD goes high. The
MAX17080 is in pulse-skipping mode during soft-start.
Figure 7 shows the MAX17080 startup sequence.
32
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17080EVKIT+ | 功能描述:电源管理IC开发工具 MAX17080 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 |
| MAX17080GTL+ | 功能描述:开关变换器、稳压器与控制器 Integrated Circuits (ICs) Voltage Regulators - Special Purpose - IC CONTROLLER AMD SVI 40-TQFN RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MAX17080GTL+T | 功能描述:开关变换器、稳压器与控制器 Integrated Circuits (ICs) Voltage Regulators - Special Purpose - IC CONTROLLER AMD SVI 40-TQFN RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MAX17081EVKIT+ | 功能描述:电源管理IC开发工具 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 |
| MAX17081EWV+ | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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