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参数资料
| 型号： | MAX17101ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR DIV PWM CM 32TQFNEP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 3 |
| 频率 - 最大： | 500kHz |
| 电源电压： | 6 V ~ 24 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 是 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 85°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
Free-Running Constant-On-Time PWM
Controller with Input Feed-Forward
The Quick-PWM control architecture is a pseudo-fixed-
frequency, constant on-time, current-mode regulator
with voltage feed-forward. This architecture relies on
the output filter capacitor’s ESR to act as a current-
sense resistor, so the feedback ripple voltage provides
the PWM ramp signal. The control algorithm is simple:
the high-side switch on-time is determined solely by a
one-shot whose pulse width is inversely proportional to
input voltage and directly proportional to output volt-
age. Another one-shot sets a minimum off-time (300ns
typ). The on-time one-shot is triggered if the error com-
where K (switching period) is set by the trilevel TON
input (see the Pin Description section). High-frequency
(400kHz/500kHz) operation optimizes the application
for the smallest component size, trading off efficiency
due to higher switching losses. This might be accept-
able in ultra-portable devices where the load currents
are lower and the controller is powered from a lower
voltage supply. Low-frequency (200kHz/300kHz) oper-
ation offers the best overall efficiency at the expense of
component size and board space.
For continuous conduction operation, the actual switching
frequency can be estimated by:
parator is low, the low-side switch current is below the
valley current-limit threshold, and the minimum off-time
one-shot has timed out.
f SW =
V OUT + V DROP 1
t ON ( V IN + V DROP 2 )
On-Time One-Shot
The heart of the PWM core is the one-shot that sets the
high-side switch on-time. This fast, low-jitter, adjustable
one-shot includes circuitry that varies the on-time in
response to battery and output voltage. The high-side
switch on-time is inversely proportional to the battery
voltage as sensed by the IN input, and proportional to
the output voltage:
On-Time = K (V OUT /V IN )
Table 3. Approximate K-Factor Errors
where V DROP1 is the sum of the parasitic voltage drops
in the inductor discharge path, including synchronous
rectifier, inductor, and PCB resistances; V DROP2 is the
sum of the resistances in the charging path, including
the high-side switch, inductor, and PCB resistances;
and t ON is the on-time calculated by the MAX17101.
SWITCHING
REGULATOR
SMPS 1
SMPS 2
TON SETTING
(kHz)
200
TON = V CC
400
TON = REF or GND
300
TON = REF or V CC
500
TON = GND
TYPICAL K-FACTOR
(μs)
5.0
2.5
3.3
2.0
K-FACTOR ERROR
(%)
±10
±12.5
±10
±12.5
COMMENTS
Use for absolute best efficiency.
Useful in 3-cell systems for lighter loads
than the CPU core or where size is key.
Considered mainstream by current
standards.
Good operating point for compound buck
designs or desktop circuits.
______________________________________________________________________________________
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| MAX17101K-SMP | 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 |
| MAX17102ETM+ | 功能描述:其他电源管理 Boost Regulator w/Scan Driver Op Amp RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX17102ETM+T | 功能描述:其他电源管理 Boost Regulator w/Scan Driver Op Amp RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX17102EVKIT+ | 功能描述:电源管理IC开发工具 MAX17102 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 |
| MAX17103ETJ+ | 功能描述:直流/直流开关转换器 DC/DC Converter w/Scan Driver VGL RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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