- 您现在的位置：买卖IC网 > PDF目录15487 > MAX15003ATM+ (Maxim Integrated Products)IC REG CTRLR BUCK PWM 48TQFN-EP PDF资料下载
参数资料
| 型号： | MAX15003ATM+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/31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： | 43 |
| 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： | 管件 |
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页第18页第19页第20页当前第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
G MOD ( DC ) =
f LC =
f ZERO , ESR =
f ZERO , ESL =
Below are equations that define the power modulator:
VIN
VRAMP
1
2 π × L × COUT
1
2 π × ESR × COUT
ESR
2 π × ESL
The switching frequency is programmable between
200kHz and 2.2MHz using an external resistor at RT.
Typically, the crossover frequency (f CO ), which is the
frequency when the system’s closed-loop gain is equal
to unity crosses the 0dB axis —should be set at or
below one-tenth the switching frequency (f SW /10) for
stable, closed-loop response.
The MAX15003 provides an internal transconductance
amplifier with its inverting input and its output available
to the user for external frequency compensation. The
flexibility of external compensation for each converter
offers wide selection of output filtering components,
especially the output capacitor. For cost-sensitive appli-
cations, use aluminum electrolytic capacitors and for
space-sensitive applications, use low-ESR tantalum or
multilayer ceramic chip (MLCC) capacitors at the out-
put. The higher switching frequencies of the MAX15003
allow the use of MLCC as the primary filter capacitor(s).
POWER MODULATOR (LARGE, BULK OUTPUT
CAPACITOR(S)) GAIN (REAL, ASYMPTOTIC/
First, select the passive and active power components
that meet the application’s output ripple, component
size, and component cost requirements. Second,
choose the small-signal compensation components to
achieve the desired closed-loop frequency response
and phase margin as outlined below.
Closed-Loop Response and Compensation
of Voltage-Mode Regulators
The power modulator’s LC lowpass filter exhibits a vari-
ety of responses, depending on the value of the L and
C (and their parasitics).
One such response is shown in Figure 5a. In this example
the power modulator’s uncompensated crossover is
approximately 1/6 th the desired crossover frequency,
f CO . Note also, the uncompensated roll-off through the
0dB plane follows the double-pole, -40dB/decade
slope and approaches 180° of phase shift, indicative of
a potentially unstable system. Together with the inher-
ent 180° of phase delay in the negative feedback
system, this may lead to near 360° or positive feed-
back—an unstable system.
The desired (compensated) roll-off follows a
-20dB/decade slope (and commensurate 90° of phase
shift), and, in this example, occurs at approximately 6x
the uncompensated crossover frequency, f CO . In this
example, a Type II compensator provides for stable
closed-loop operation, leveraging the +20dB/decade
slope of the capacitor’s ESR zero (see Figure 5b).
POWER MODULATOR (LARGE, BULK OUTPUT
CAPACITOR(S)) AND TYPE II COMPENSATION GAIN
40
PHASE RESPONSE vs. FREQUENCY
MAX15003 fig05a
f LC
90
(ASYMPTOTIC)/PHASE RESPONSE vs. FREQUENCY
MAX15003 fig05b
80 180
<G EA
20
45
60
135
0
-20
|G MOD |
< G MOD
|G MOD |
f ZERO,ESR
0
-45
40
20
0
|G EA |
f ZERO,ESR
f LC
90
45
0
-40
-60
f ZERO,ESL
-90
-135
-20
-40
-60
< G MOD
f ZERO,ESL
-45
-90
-135
f CO
-80
-180
-80
-180
10
100
1k
10k
100k
1M
10M
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 5a. Power Modulator Gain and Phase Response (Large,
Bulk COUT)
Maxim Integrated
FREQUENCY (Hz)
Figure 5b. Power Modulator (Large, Bulk COUT) and Type II
Compensator Responses
21
相关PDF资料 |
PDF描述 |
|---|---|
| MAX5060ETI+ | IC REG CTRLR BUCK PWM CM 28-TQFN |
| MAX1541ETL+ | IC REG CTRLR DIVIDER PWM 40-TQFN |
| MAX15002ATL+ | IC REG CTRLR BUCK PWM 40-TQFNEP |
| MAX1540AETJ+ | IC REG CTRLR DIVIDER PWM 32-TQFN |
| MAX1956ETI+ | IC REG CTRLR BUCK PWM VM 28-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15003ATM+ | 功能描述:DC/DC 开关控制器 Triple-Out Buck Ctlr w/Track/Sequence 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 |
| MAX15003ATM+T | 功能描述:DC/DC 开关控制器 Triple-Out Buck Ctlr w/Track/Sequence 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 |
| 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 |
发布紧急采购，3分钟左右您将得到回复。