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參數(shù)資料
| 型號： | PTH12060YAZT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, DIP-10 |
| 文件頁數(shù)： | 17/19頁 |
| 文件大?。?/td> | 823K |
| 代理商： | PTH12060YAZT |
www.ti.com
APPLICATION INFORMATION
Typical DDR Application Diagram
Inhibit
+
DDRII/
QDRII
PTH05010W
VDDQ I/O Memory
Inhibit
+
PTH05050Y
DDR Termination
+
2 ×
330 F
2 ×
22 F
2 ×
330 F
2 ×
22 F
+Sense
Margin ±
Auto-Track
VI
+VADJ
1 k
VI= 5V
220 F
47 F
470 F
47 F
5.51 k
VO
+VREF
VI
UDG05096
VTT
VTT = 0.9 V
VDDQ = 1.8 V
CAPACITOR RECOMMENDATIONS FOR THE PTH03060Y AND PTH05060Y DDR POWER
Input Capacitor
Output Capacitors
PTH03060Y
PTH05060Y, PTH12060Y
SLTS222A–MARCH 2004–REVISED OCTOBER 2005
MODULES (3.3-V/5-V OPTION)
The recommended input capacitor(s) is determined by the 330 F(1) minimum capacitance and 300 mArms
minimum ripple current rating.
Ripple current and less than 160 m equivalent series resistance (ESR) values are the major considerations,
along with temperature, when designing with different types of capacitors. Unlike polymer tantalum, regular
tantalum capacitors have a recommended minimum voltage rating of 2 × (maximum DC voltage + AC ripple).
This is standard practice to insure reliability.
For improved ripple reduction on the input bus, ceramic capacitors may be substituted for electrolytic types using
the minimum required capacitance.
For applications with load transients (sudden changes in load current), regulator response will benefit from
external output capacitance. The recommended output capacitance of 470 F will allow the module to meet its
transient response specification (see Electrical Specifications table). For most applications, a high quality
computer-grade aluminum electrolytic capacitor is adequate. These capacitors provide decoupling over the
frequency range, 2 kHz to 150 kHz, and are suitable when ambient temperatures are above 0°C. For operation
below 0°C tantalum, ceramic or Os-Con type capacitors are recommended. When using one or more
non-ceramic capacitors, the calculated equivalent ESR should be no lower than 4 m (7 m using the
manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in
Table 1.
7
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