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参数资料
| 型号： | MAX1545ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 17/43页 |
| 文件大小： | 0K |
| 描述： | IC QUICK-PWM DUAL-PHASE 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，Intel Pentium? IV |
| 输入电压： | 2 V ~ 28 V |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 1.85 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 带卷 (TR) |
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Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
Table 1. Component Selection for Standard Multiphase Applications*
MAX1519/MAX1545
MAX1519/MAX1545
DESIGNATION
Input Voltage Range
VID Output Voltage
(D4–D0)
Suspend Voltage
(SUS, S0–S1)
Maximum Load Current
Number of Phases ( η TOTAL )
Inductor (per phase)
Switching Frequency
High-Side MOSFET
(N H , per phase)
Low-Side MOSFET
(N L , per phase)
Total Input Capacitance (C IN )
Total Output Capacitance
(C OUT )
Current-Sense Resistor
(R SENSE , per phase)
2-PHASE DESKTOP P4
Circuit of Figure 1
7V to 24V
1.5V
(CODE = GND, D4–D0 = 01110)
Not Used
(SUS = GND)
60A
Two phases
(1) MAX1519/MAX1545
0.6μH
Panasonic ETQP1H0R6BFA
300kHz (TON = REF)
Siliconix (1) Si7886DP
International Rectifier (2) IRF6604
Siliconix (2) Si7442DP or
International Rectifier (2) IRF6603
(6) 10μF, 25V
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
(4) 680μF, 2.5V
Sanyo 2R5TPD680M
1.0m Ω
Panasonic ERJM1WTJ1M0U
4- PHASE DESKTOP P4
Circuit of Figure 12
7V to 24V
1.5V
(CODE = GND, D4–D0 = 01110)
Not Used
(SUS = GND)
60A
Four phases
(1) MAX1519/MAX1545 + (2) MAX1980
0.7μH Panasonic ETQP2H0R7BFA or
0.8μH Sumida CDEP105L-0R8
300kHz (TON = REF)
International Rectifier (1) IRF7811W or
Fairchild (1) FDS6694
Fairchild (2) FDS6688 or
Siliconix (1) Si7442DP
(6) 10μF, 25V
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
(4) 680μF, 2.5V
Sanyo 2R5TPD680M
1.5m Ω
Panasonic ERJM1WTJ1M5U
* Contact Intel for the Mobile P4 specifications and contact Maxim for a reference schematic.
Power-Up Sequence
The MAX1519/MAX1545 are enabled when SHDN is
driven high (Figure 2). The reference powers up first.
Once the reference exceeds its undervoltage lockout
threshold, the PWM controller evaluates the DAC target
and starts switching.
For the MAX1519/MAX1545, the slew-rate controller
ramps up the output voltage in 25mV increments to the
proper operating voltage (see Tables 3 and 4) set by
troller pulls VROK low until at least 3ms after the
MAX1519/MAX1545 reach the target DAC code.
Shutdown
When SHDN goes low, the MAX1519/MAX1545 enter
low-power shutdown mode. VROK is pulled low imme-
diately, and the output voltage ramps down to 0V in
25mV increments at 4 times the clock rate set by
R TIME :
either D0–D4 (SUS = GND) or S0–S1 (SUS = REF or
high). The ramp rate is set with the R TIME resistor (see
the Output Voltage Transition Timing section). The con-
t SHDN ≤
4 ? V DAC ?
f SLEW ? ? V LSB ? ?
______________________________________________________________________________________
17
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