- 您现在的位置：买卖IC网 > PDF目录13526 > MAX16909RATE/V+ (Maxim Integrated Products)IC REG BUCK 5V/ADJ 3A 16TQFN PDF资料下载
参数资料
| 型号： | MAX16909RATE/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V/ADJ 3A 16TQFN |
| 标准包装： | 60 |
| 类型： | 降压（降压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 5V，1 V ~ 10 V |
| 输入电压： | 3.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 220kHz ~ 1MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 包装： | * |
| 供应商设备封装： | * |
MAX16909
36V, 220kHz to 1MHz Step-Down Converter
with Low Operating Current
Detailed Description
The MAX16909 is a constant-frequency, current-mode,
automotive buck converter with an integrated high-side
switch. The device operates with input voltages from 3.5V
to 36V and tolerates input transients from 3.5V up to 42V.
During undervoltage events, such as cold-crank condi-
tions, the internal pass device maintains 98% duty cycle.
The switching frequency is resistor programmable from
220kHz to 1MHz to allow optimization for efficiency, noise,
and board space. A synchronization input FSYNC allows
the device to synchronize to an external clock frequency.
During light-load conditions, the device enters skip mode
for high efficiency. The 5V fixed output voltage eliminates
the need for external resistors and reduces the supply
current to 30 F A. See the Internal Block Diagram for more
information.
Wide Input Voltage Range (3.5V to 36V)
The device includes two separate supply inputs, SUP
and SUPSW, specified for a wide 3.5V to 36V input
voltage range. V SUP provides power to the device and
V SUPSW provides power to the internal switch. When
the device is operating with a 3.5V input supply, certain
conditions such as cold crank can cause the voltage at
SUPSW to drop below the programmed output voltage.
As such, the device operates in a high duty-cycle mode
to maintain output regulation.
Linear Regulator Output (BIAS)
The device includes a 5V linear regulator, BIAS, that
provides power to the internal circuitry. Connect a 1 F F
ceramic capacitor from BIAS to GND.
External Clock Input (FSYNC)
The device synchronizes to an external clock signal
applied at FSYNC. The signal at FSYNC must have a
10% higher frequency than the internal clock frequency
for proper synchronization.
Soft-Start
The device includes an 8.5ms fixed soft-start time for up
to 500 F F capacitive load with a 3A resistive load.
Minimum On-Time
The device features a 110ns minimum on-time that
ensures proper operation at 1MHz switching frequency
and high differential voltage between the input and the
output. This feature is extremely beneficial in automo-
tive applications where the board space is limited and
Maxim Integrated
the converter needs to maintain a well-regulated output
voltage using an input voltage that varies from 9V to
18V. Additionally, the device incorporates an innovative
design for fast-loop response that further ensures good
output-voltage regulation during transients.
System Enable (EN)
An enable-control input (EN) activates the device from its
low-power shutdown mode. EN is compatible with inputs
from automotive battery level down to 3.3V. The high-
voltage compatibility allows EN to be connected to SUP,
KEY/KL30, or the INH pin of a CAN transceiver.
EN turns on the internal regulator. Once V BIAS is above
the internal lockout threshold, V UVL = 3.15V (typ), the
controller activates and the output voltage ramps up
within 8.5ms.
A logic-low at EN shuts down the device. During shut-
down, the internal linear regulator and gate drivers turn
off. Shutdown is the lowest power state and reduces the
quiescent current to 5 F A (typ). Drive EN high to bring the
device out of shutdown.
Overvoltage Protection
The device includes overvoltage protection circuitry that
protects the device when there is an overvoltage condi-
tion at the output. If the output voltage increases by more
than 110% of its set voltage, the device stops switching.
The device resumes regulation once the overvoltage
condition is removed.
Fast Load-Transient Response
Current-mode buck converters include an integrator
architecture and a load-line architecture. The integra-
tor architecture has large loop gain but slow transient
response. The load-line architecture has fast transient
response but low loop gain. The device features an inte-
grator architecture with innovative designs to improve
transient response. Thus, the device delivers high output-
voltage accuracy, plus the output can recover quickly
from a transient overshoot, which could damage other
on-board components during load transients.
Overload Protection
The overload protection circuitry is triggered when the
device is in current limit and V OUT is below the reset
threshold. Under these conditions the device turns the
high-side FET off for 16ms and re-enters soft-start. If the
overload condition is still present, the device repeats the
cycle.
11
相关PDF资料 |
PDF描述 |
|---|---|
| VE-BTY-EV-F1 | CONVERTER MOD DC/DC 3.3V 99W |
| 50YXG470MEFC16X16 | CAP ALUM 470UF 50V 20% RADIAL |
| VE-2TZ-EV-F4 | CONVERTER MOD DC/DC 2V 60W |
| MAX737CPD+ | IC REG INV -15V 125MA 14DIP |
| VE-2TZ-EV-F3 | CONVERTER MOD DC/DC 2V 60W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16909RAUE/V+ | 功能描述:直流/直流开关转换器 36V 220kHz to 1MHz Step-Down 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 |
| MAX16909RAUE/V+T | 功能描述:直流/直流开关转换器 36V 220kHz to 1MHz Step-Down 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 |
| MAX16909RAUE+ | 制造商:Maxim Integrated Products 功能描述:36V, 220KHZ TO 1MHZ STEP-DOWN CONVERTER WITH LOW OPERATING C - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC REG BUCK 5V/ADJ 3A 16TSSOP 制造商:Maxim Integrated Products 功能描述:36V 220kHz-1MHz Step-Down Converter |
| MAX16909RAUE+CFZ | 制造商:Maxim Integrated Products 功能描述:36V, 220KHZ TO 1MHZ STEP-DOWN CONVERTER WITH LOW OPERATING C - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC REG BUCK 5V/ADJ 3A 28-TQFN |
| MAX16909RAUE+T | 制造商:Maxim Integrated Products 功能描述:36V, 220KHZ TO 1MHZ STEP-DOWN CONVERTER WITH LOW OPERATING C - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC REG BUCK 5V/ADJ 3A 16TSSOP 制造商:Maxim Integrated Products 功能描述:36V 220kHz-1MHz Step-Down Converter |
发布紧急采购，3分钟左右您将得到回复。