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부품번호 | FAN1654 기능 |
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기능 | 1.5A LDO/ DDR Bus Termination Regulator | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 7 페이지수
www.fairchildsemi.com
FAN1654
1.5A LDO, DDR Bus Termination Regulator
Features
• Sinks and sources 1A continuous, 1.5A peak
• -40°C to +125°C Operating Range
• Load regulation: (VDDQ/2) ± 40mV
• 5mA VREF buffer tracks VTT
• On-chip thermal limiting
• Power-enhanced eTSSOP™-16 package
• Low Current Shutdown Mode
• Output Short Circuit Protection
Applications
• DDR terminators
Description
The FAN1654 is a low-cost bi-directional LDO specifically
designed for terminating DDR memory bus. It can both sink
and source up to 1A continuous, 1.5A peak, providing
enough current for most DDR applications. Load regulation
meets the JEDEC spec, VTT = (VDDQ/2) ± 40mV.
The FAN1654 includes a buffered reference voltage capable
of supplying up to 5mA current. On-chip thermal limiting
provides protection against a combination of power overload
and ambient temperature that would create an excessive
junction temperature. A shutdown input puts the FAN1654
into a low power mode for laptop computer applications.
The FAN1654 regulator is available in a power-enhanced
eTSSOP™-16 package, and the standard SOIC-14
Block Diagram
VDDQ
VDD
VDD VDD SHDN
VREFOUT
VREFIN
200k
-
+
+
200k
FAN1655
VSSQ
-
VSS VSS VSS
VTTFORCE
VTTFORCE
VTTSENSE
REV. 1.0.5 4/17/02
PRODUCT SPECIFICATION
FAN1654
Absolute Maximum Ratings
Supply Voltage VDD, VDDQ
Junction Temperature, TJ
Storage Temperature
Lead Soldering Temperature, 10 seconds
Power Dissipation, PD
6V
150°C
-65 to 150°C
300°C
1.4W
Recommended Operating Conditions
Parameter
Supply Voltage VDD
Supply Voltage VDDQ
Ambient Operating Temperature
VREFIN
Conditions
Min.
2.3
2.2
-40
1.1
Typ.
2.5
2.5
1.25
Max.
3.6
3.0
125
1.5
Units
V
V
°C
V
Electrical Characteristics
(VDD = VDDQ = 2.5V ± 0.2V, and TA = 25˚C using circuit in Figure 1, unless otherwise noted.)
The • denotes specifications which apply over the specified operating temperature range.
Parameter
VTT Output Voltage
VTT Output Slew Rate
VTT Leakage Current
VTT Current Limit
VREFIN Input Impedance
VREFOUT Output Voltage
VREFOUT Output Current
VREFOUT Leakage Current
SHDN Logic High
SHDN Logic Low
IDD Supply Current
VDDQ Leakage Current
VDD Leakage Current
SHDN Input Current
Over-Temperature Shutdown
Over-Temperature Hysteresis
Conditions
IOUT = 0A, VREFIN = open
VDDQ = 2.3V •
VDDQ = 2.5V •
VDDQ = 2.7V •
IOUT = +1A, VREFIN = open
VDDQ = 2.3V
VDDQ = 2.5V
VDDQ = 2.7V
Cload = 10µF
SHDN = 0V
•
No load
VREFIN = 1.150V •
VREFIN = 1.250V •
VREFIN = 1.350V •
VDDQ = 2.3V
•
SHDN = 0V
•
•
•
No load, SHDN = 2.7V
•
SHDN = 0V
•
SHDN = 0V
•
SHDN = 2.7V
•
Min.
1.135
1.235
1.335
1.110
1.210
1.310
-50
1.145
1.245
1.345
-5
-10
1.667
Typ.
1.150
1.250
1.350
1.150
1.250
1.350
0.1
±2
100
1.150
1.250
1.350
3
6
3
50
155
30
Max. Units
1.165
1.265
1.365
V
V
V
1.190
1.290
1.390
V
V
V
V/µsec
50 µA
A
KΩ
1.155
1.255
1.355
5
10
0.800
10
10
50
75
V
V
V
mA
µA
V
V
mA
µA
µA
µA
°C
°C
4 REV. 1.0.5 4/17/02
4페이지 PRODUCT SPECIFICATION
Ordering Information
Product Number
FAN1654MTF
FAN1654MTFX
FAN1654M
FAN1654MX
Package
eTSSOP-16
eTSSOP-16 in tape and reel
SOIC-14
SOIC-14 in tape and reel
FAN1654
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
4/17/02 0.0m 004
Stock#DS30004854
2002 Fairchild Semiconductor Corporation
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부품번호 | 상세설명 및 기능 | 제조사 |
FAN1654 | 1.5A LDO/ DDR Bus Termination Regulator | Fairchild Semiconductor |
FAN1655 | 3A DDR Bus Termination Regulator | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |