- 您现在的位置：买卖IC网 > PDF目录1836 > MAX15020ATP+T (Maxim Integrated Products)IC REG BUCK ADJ 2A 20TQFN PDF资料下载
参数资料
| 型号： | MAX15020ATP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 20TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 36 V |
| 输入电压： | 7.5 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 300kHz ~ 500kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
Power Dissipation
The MAX15020 is available in a thermally enhanced
package and can dissipate up to 2.7W at T A = +70°C.
When the die temperature reaches +160°C, the part
shuts down and is allowed to cool. After the parts cool
by 20°C, the device restarts with a soft-start.
The power dissipated in the device is the sum of the
power dissipated from supply current (P Q ), transition
losses due to switching the internal power MOSFET
(P SW ), and the power dissipated due to the RMS cur-
rent through the internal power MOSFET (P MOSFET ).
The total power dissipated in the package must be lim-
ited such that the junction temperature does not
The power loss due to the switching supply current
(I SW ):
P Q = V IN x I SW
The total power dissipated in the device is:
P TOTAL = P MOSFET + P SW + P Q
PCB Layout and Routing
Use the following guidelines to layout the switching
voltage regulator:
1) Place the IN and DVREG bypass capacitors close
to the MAX15020 PGND pin. Place the REG
bypass capacitor close to the GND pin.
exceed its absolute maximum rating of +150°C at maxi-
2)
Minimize the area and length of the high-current
mum ambient temperature. Calculate the power lost in
the MAX15020 using the following equations:
The power loss through the switch:
P MOSFET = I RMS _ MOSFET 2 × R ON
3)
loops from the input capacitor, switching MOSFET,
inductor, and output capacitor back to the input
capacitor negative terminal.
Keep short the current loop formed by the switch-
ing MOSFET, Schottky diode, and input capaci-
tor.
I RMS _ MOSFET =
? ? 3
? I 2 PK + + ( I P K + × I PK ? ) + I PK ? ? × D
4)
Keep GND and PGND isolated and connect them
at one single point close to the negative terminal
I PK + = I OUT +
I PK ? = I O UT ?
Δ I L
2
Δ I L
2
5)
6)
of the input filter capacitor.
Place the bank of output capacitors close to the
load.
Distribute the power components evenly across
the board for proper heat dissipation.
R ON is the on-resistance of the internal power MOSFET
(see the Electrical Characteristics table).
The power loss due to switching the internal MOSFET:
7)
Provide enough copper area at and around the
MAX15020 and the inductor to aid in thermal dis-
sipation.
P SW =
V IN × I OUT × (t R × t F ) × f SW
4
8)
Use 2oz copper to keep the trace inductance and
resistance to a minimum. Thin copper PCBs can
compromise efficiency since high currents are
involved in the application. Also, thicker copper
where t R and t F are the rise and fall times of the internal
power MOSFET measured at LX.
9)
conducts heat more effectively, thereby reducing
thermal impedance.
Place enough vias in the pad for the EP of the
MAX15020 so that the heat generated inside can
be effectively dissipated by PCB copper.
16
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX15021ATI+T | IC REG BUCK SYNC ADJ DL 28TQFN |
| MAX15023ETG+ | IC REG CTRLR BUCK PWM 24TQFNEP |
| MAX15026CATD+T | IC REG CTRLR BUCK PWM VM 14TDFN |
| MAX15027ATB+T | IC REG LDO ADJ 1A 10-TDFN |
| MAX15030ATB+T | IC REG LDO ADJ .5A 10-TDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15020EVKIT+ | 功能描述:电源管理IC开发工具 MAX15020 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 |
| MAX15021ATB+ | 功能描述:直流/直流开关调节器 DUAL 4A/2A RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX15021ATI/V+ | 制造商:Maxim Integrated Products 功能描述:DUAL, 4A/2A, 4MHZ, STEP-DOWN DC-DCREGULATOR WITH TRACKING/SE - Rail/Tube |
| MAX15021ATI/V+T | 制造商:Maxim Integrated Products 功能描述:DUAL, 4A/2A, 4MHZ, STEP-DOWN DC-DCREGULATOR WITH TRACKING/SE - Tape and Reel |
| MAX15021ATI+ | 功能描述:直流/直流开关调节器 Dual 4A/2A 4MHz w/Tracking/Seq RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。