- 您现在的位置：买卖IC网 > PDF目录1836 > MAX15003ATM+T (Maxim Integrated Products)IC REG CTRLR BUCK PWM 48TQFN-EP PDF资料下载
参数资料
| 型号： | MAX15003ATM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/31页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 48TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 3 |
| 频率 - 最大： | 2.2MHz |
| 电源电压： | 5.5 V ~ 23 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 ~ 125°C |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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页当前第18页第19页第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
MAX15003
Triple-Output Buck Controller with
Tracking/Sequencing
The minimum input voltage is limited by the maximum
duty cycle and is calculated using the following equa-
CURRENT LIMIT
IN COUNT OF 8
N CL
CLR
INITIATE HICCUP
TIMEOUT
N HT
tion:
V IN ( MIN ) ≥
1 ? ( t OFF ( MIN ) × f SW
V OUT
)
where t OFF(MIN) typically is equal to 150ns.
Inductor Selection
Three key inductor parameters must be specified for
operation with the MAX15003: inductance value (L),
IN COUNT OF 3
N CLR
CLR
Figure 3. Hiccup-Mode Block Diagram
PWM Controller
Design Procedures
Setting the Switching Frequency
Connect a 500k ? to 45k ? resistor from RT to SGND to
program the switching frequency from 200kHz to
2.2MHz. Calculate the switching frequency using the
following equation:
f SW = 10 11 /(R RT + 1750)
Higher frequencies allow designs with lower inductor
peak inductor current (I PEAK ), and inductor saturation
current (I SAT ). The minimum required inductance is a
function of operating frequency, input-to-output voltage
differential, and the peak-to-peak inductor current
( ? I P-P ). Higher ? I P-P allows for a lower inductor value. A
lower inductance value minimizes size and cost and
improves large-signal and transient response.
However, efficiency is reduced due to higher peak cur-
rents and higher peak-to-peak output voltage ripple for
the same output capacitor. A higher inductance
increases efficiency by reducing the ripple current,
however resistive losses due to extra wire turns can
exceed the benefit gained from lower ripple current lev-
els especially when the inductance is increased without
also allowing for larger inductor dimensions. A good
rule of thumb is to choose ? I P-P equal to 30% of the full
load current. Calculate the inductance using the follow-
ing equation:
values and less output capacitance. Consequently,
peak currents and I 2 R losses are lower at higher
switching frequencies, but core losses, gate-charge
currents, and switching losses increase.
L =
V OUT ( V IN ? V OUT )
V IN × f SW × ? I P ? P
Effective Input Voltage Range
Although the MAX15003 converters can operate from
input supplies ranging from 5.5V to 23V, the input volt-
age range can be effectively limited by the MAX15003
duty-cycle limitations for a given output voltage. The
maximum input voltage is limited by the minimum on-
time (t ON(MIN) ):
V IN and V OUT are typical values so that efficiency is
optimum for typical conditions. The switching frequen-
cy is programmable between 200kHz and 2.2MHz (see
Oscillator/Synchronization Input/Phase Staggering (RT,
SYNC, PHASE) section). The peak-to-peak inductor
current, which reflects the peak-to-peak output ripple,
is worst at the maximum input voltage. See the Output
Capacitor Selection section to verify that the worst-case
V IN ( MAX ) ≤
where t ON(MIN) is 75ns.
18
V OUT
t ON ( MIN ) × f SW
output current ripple is acceptable. The inductor satu-
ration current (I SAT ) is also important to avoid runaway
current during continuous output short-circuit condi-
tions. Select an inductor with an I SAT specification high-
er than the maximum peak current.
Maxim Integrated
相关PDF资料 |
PDF描述 |
|---|---|
| MAX15005AAUE/V+ | IC REG CTRLR PWM CM 16-TSSOP |
| MAX15006BASA+ | IC REG LDO 5V 50MA 8-SOIC |
| MAX15008ATJ+ | IC REG LDO 5V/ADJ .3A 32TQFN-EP |
| MAX15009ATJ+ | IC REG LDO 5V/ADJ .3A 32TQFN-EP |
| MAX1501ETE/V+ | IC BATTERY CHARGER 16WQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15003EVKIT+ | 功能描述:电源管理IC开发工具 MAX15003 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 |
| MAX15004AAUE/V+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr 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 |
| MAX15004AAUE/V+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr 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 |
| MAX15004AAUE+ | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr 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 |
| MAX15004AAUE+T | 功能描述:电流型 PWM 控制器 Flyback/Boost/SEPIC Power-Supply Ctlr 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 |
发布紧急采购，3分钟左右您将得到回复。