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| 型号： | MAX1536ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3.6A 28TQFN |
| 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： | 0.7 V ~ 5.5 V |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 3.6A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
Down Regulator with Dynamic Output Voltage Control
Applications Information
Multioutput Voltage Settings
The MAX1536 is optimized to work in applications that
require two dynamic output voltages; however, discrete
logic or a DAC connected to REFIN allows three or
more dynamic output voltages.
Figure 6 shows an application circuit providing four
voltage levels using discrete logic. Switching resistors
Circuit Layout and Grounding
Good layout is necessary to achieve the intended out-
put power level, high efficiency, and low noise. Good
layout includes the use of a ground plane, careful com-
ponent placement, and correct routing of traces using
appropriate trace widths. Refer to the MAX1536 EV Kit
for layout reference.
in and out of the resistor network changes the voltage
at REFIN. An edge-detection circuit is added to trigger
V DDQ
V CC
SKIP
IN
V IN
a 1μs pulse on GATE to start the fault-blanking and
C IN
forced-PWM operation. GATE requires a minimum
pulse width of 500ns. The edge-detection circuit is not
required if the MAX1536 is always in PWM mode ( SKIP
= V CC ) and fault blanking is not necessary.
1000pF
10k ?
MAX1536
REFIN
FB
LX
L
V TT =
V DDQ
2
Active Bus Termination
Active bus termination power supplies generate a volt-
age rail that tracks a set reference. Active bus termina-
1000pF
10k ?
AGND
PGND
C OUT
tion power supplies are unique because they source
and sink current. DDR memory architecture requires
active bus termination. In DDR memory architecture,
the termination voltage is set at exactly half the memory
supply voltage. Configure the MAX1536 to generate the
termination voltage using a resistor-divider at REFIN.
Force the MAX1536 to operate in PWM mode ( SKIP =
V CC ) to source and sink current. Figure 7 shows the
MAX1536 configured as a DDR termination regulator.
Connect GATE and FBLANK to AGND when unused.
R4
REF
R1
GATE
FBLANK
Figure 7. Active Bus Termination
OD
OD
V DDQ = DDR MEMORY SUPPLY VOLTAGE
V TT = TERMINATION SUPPLY VOLTAGE
B
R3
REFIN
A
C1
R2
MAX1536
V OUT
50mV/div
AGND
V LX
1.5k ?
1000pF
OD
OD
0
0
5V/div
I LX
2A/div
GATE
1.5k ?
1000pF
10 μ s/div
V IN = 3.3V, V OUT = 1.25V, I OUT = -1A TO +1A TO -1A
Figure 6. Multioutput Voltage Settings
Figure 8. Source/Sink Waveforms
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1536EVKIT | 功能描述:直流/直流开关调节器 Evaluation Kit for the MAX1536 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 |
| MAX1537AETX+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1537ETX | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX1537ETX-T | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| MAX1537EVKIT | 制造商:Maxim Integrated Products 功能描述:MAIN POWER SUPPLY CONTROLLER FOR NOTEBOOK - Bulk |
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