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| 型号： | MAX5065EAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 90% |
| 电源电压： | 4.75 V ~ 28 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
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Dual-Phase, +0.6V to +3.3V Output Parallelable,
Average-Current-Mode Controllers
Pin Description (continued)
PIN
MAX5065 MAX5067
NAME
FUNCTION
27
36
CLKOUT
Oscillator Output. CLKOUT is phase-shifted from CLKIN by the amount determined by the
PHASE input. Use CLKOUT to parallel additional MAX5065/MAX5067s.
CMOS Logic Clock Input. Drive CLKIN with a frequency range between 125kHz and 600kHz or
28
38
CLKIN
connect to V CC or SGND. Connect CLKIN to SGND to set the internal oscillator to 250kHz or
connect to V CC to set the internal oscillator to 500kHz. CLKIN has an internal 5μA pulldown
current.
Overvoltage Protection Circuit Input. Connect OVPIN to the center of the resistive-divider
—
6
OVPIN
between V OUT and GND. When OVPIN exceeds +0.8V with respect to SGND, OVPOUT latches
DH_ low and DL_ high. Toggle EN low to high or recycle the power to reset the latch.
—
8
OVPOUT
Overvoltage Protection Output. Use the OVPOUT active-high, push-pull output to trigger a
safety device such as an SCR.
Power-Good Output. The open-drain, active-low PGOOD output goes low when the output
—
9
PGOOD
voltage falls out of regulation or a phase failure is detected. The power-good window-
comparator thresholds are +8% and -10% of the output voltage. Forcing EN low also forces
PGOOD low.
1, 2, 3, 4,
—
15, 18,
21, 33,
N.C.
No Connection. Not internally connected.
37, 44
Supply Voltage for Low-Side and High-Side Drivers. V CC powers V DD . Connect a parallel
—
26
V DD
combination of 0.1μF and 1μF ceramic capacitors to PGND and a 1 ? resistor to V CC to filter
out the high peak currents of the driver from the internal circuitry.
Detailed Description
The MAX5065/MAX5067 average-current-mode PWM
controllers drive two out-of-phase buck converter chan-
nels. Average-current-mode control improves current
sharing between the channels while minimizing compo-
nent derating and size. Parallel multiple MAX5065/
MAX5067 regulators to increase the output current
capacity. For maximum ripple rejection at the input, set
the phase shift between phases to 90 ° for two paral-
leled converters, or 60 ° for three paralleled converters.
Paralleling the MAX5065/MAX5067s improves design
flexibility in applications requiring upgrades (higher
load).
Dual-phase converters with an out-of-phase locking
arrangement reduce the input and output capacitor
ripple current, effectively multiplying the switching fre-
quency by the number of phases. Each phase of the
MAX5065/MAX5067 consists of an inner average cur-
rent loop controlled by a common outer-loop voltage-
error amplifier (VEA). The combined action of the two
+3.3V (MAX5065) and +0.8V to +3.3V (MAX5067) using
a resistive-divider at SENSE+ and SENSE-.
V IN , V CC , V DD
The MAX5065/MAX5067 accept a wide input voltage
range of +4.75V to +5.5V or +8V to +28V. All internal
control circuitry operates from an internally regulated
nominal voltage of +5V (V CC ). For input voltages of +8V
or greater, the internal V CC regulator steps the voltage
down to +5V. The V CC output voltage regulates to +5V
while sourcing up to 80mA. Bypass V CC to SGND with
4.7μF and 0.1μF low-ESR ceramic capacitors for high-
frequency noise rejection and stable operation (Figures
1, 2, and 3).
Calculate power dissipation in the MAX5065/MAX5067
as a product of the input voltage and the total V CC reg-
ulator output current (I CC ). I CC includes quiescent cur-
rent (I Q ) and gate-drive current (I DD ):
P D = V IN x I CC (1)
inner current loops and the outer voltage loop corrects
the output voltage errors and forces the phase currents
to be equal. Program the output voltage from +0.6V to
I CC = I Q + f SW x (Q G1 + Q G2 + Q G3 + Q G4 )
(2)
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5065EAI+ | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EAI+T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EAI-T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX5065EVKIT | 功能描述:电源管理IC开发工具 MAX5065 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 |
| MAX5066 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications |
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