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부품번호 | APL5338 기능 |
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기능 | 2A Bus Termination Regulator | ||
제조업체 | Anpec Electronics | ||
로고 | |||
전체 19 페이지수
APL5338
2A Bus Termination Regulator
Features
General Description
• Sourcing and Sinking Current up to 2A
The APL5338 linear regulator is designed to provide a
• Wide Input Voltage Range: 1.2V to 3.6V
regulated voltage with bi-directional output current for
•
DDR-SDRAM termination. The APL5338 integrates two
VTT and VTTREF Voltage Tracks at Half the VREF
power transistors to source or sink current up to 2A. It
Voltage
also incorporates current-limit and thermal shutdown into
• VTT and VTTREF Voltage with ±10mV Accuracy a single chip.
• Excellent Load Transient Response
The output voltage of APL5338 tracks the voltage at VREF
• Stable with 10µF Ceramic Output Capacitor
pin. An internal resistor divider is used to provide a half
• Current-Limit Protection
• Thermal Shutdown Protection
• Power-On-Reset Function on VCNTL
• S3, S5 Input Signals for ACPI States
voltage of VREF for VTTREF and VTT Voltage. The VTT
output voltage is only requiring 10µF of ceramic output
capacitance for stability and fast transient response. The
S3 and S5 pins provide the sleep state for VTT (S3 state)
and suspend state (S4/S5 state) for device when S5 and
• Small MSOP-10P and TDFN3x3-10 Packages
S3 are both pulled low the device provides the soft-off for
• Lead Free and Green Devices Available
(RoHS Compliant)
VTT and VTTREF. The MSOP-10P and TDFN3x3-10 pack-
age with a copper pad is available which provides excel-
lent thermal impedance.
Applications
• DDR 2/3 Memory Termination
Simplified Application Circuit
CIN
10µF
COUT
10µF
APL5338
1 VREF
10
VCNTL
2 VIN
S5 9
3
VTT
GND 8
4
PGND
S3 7
5 VTTSNS VTTREF 6
C1
0.1µF
Pin Configuration
VREF 1
VIN 2
VTT 3
PGND 4
VTTSEN 5
10 VCNTL
9 S5
8 GND
7 S3
6 VTTREF
MSOP-10P (Top View)
VREF 1
VIN 2
VTT 3
PGND 4
VTTSEN 5
GND
10 VCNTL
9 S5
8 GND
7 S3
6 VTTREF
TDFN3X3-10
(Top View)
= Exposed Pad
(connected to ground plane for better heat dissipation)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
APL5338
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over VCNTL=5V, VIN=VREF=1.8V, CIN=10µF, COUT=10µF and TA= -40 ~ 85 oC.
Typical values are at TA=25oC.
Symbol
Parameter
Test Conditions
APL5338
Unit
Min. Typ. Max.
VTT OUTPUT (Cont.)
VTT Output Accuracy to
VTTREF
ILIM VTT Current Limit
VTT Leakage Current
VTTSNS Leakage Current
VTT Discharge Current
VTTREF OUTPUT
VIN=VREF=1.35V/1.5V/1.8V/3.15V,
over temperature and load current range
Sourcing Current
Sinking Current
VTT=0.9V, VS3=0V, VS5=5V, TJ =25 oC
VTT=0.9V, TJ =25 oC
VTT=0.5V, VS3=VS5=0V, TJ =25 oC, VREF=0V
-10 - 10 mV
2.8 3.0 3.5
A
-2.8 -3.0 -3.5
- 2.5 4.0
µA
-1.0 - 1.0
15 25 35 mA
VTTREF VTTREF Output Voltage
VTTREF Output Voltage
Tolerance to 0.5VREF
IVTTREF VTTREF Source Current Limit
IVTTREFDIS VTTREF Discharge Current
LOGIC THRESHOLD
VIN=VREF=3.15V
VIN=VREF=1.8V
VIN=VREF=1.5V
VIN=VREF=1.35V
VIN=VREF, IVTTREF<10mA
VTTREF=0V
VTTREF=0.5V, VS3=VS5=0V, TJ =25 oC
- 1.575 -
- 0.9 -
- 0.75 -
- 0.675 -
V
-10 - +10 mV
10 20 30
mA
0.3 0.5 0.8
VIH High Threshold Voltage
VIL Low Threshold Voltage
S3, S5 Hysteresis
Leakage Current
THERMAL SHUTDOWN
VS3, VS5 Rising
VS3, VS5 Falling
S3, S5, TJ =25 oC
1.6 -
-
- - 0.4 V
- 0.2 -
- - 4 µA
TSD Thermal Shutdown Temperature TJ Rising
Thermal Shutdown Hysteresis
- 150 -
oC
- 30 -
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2013
4
www.anpec.com.tw
FreeDatasheethttp://www.datasheet4u.com/
4페이지 APL5338
Operating Waveforms
(Refer to the section “Typical Application Circuits” VCNTL=5V, VIN=VREF=1.8V, TA=25oC)
Startup Waveform-S5 Low to High
Startup Waveform-S3 Low to High
1 VS5
VS3
2
VTTREF
3
VTT
4
IVTT=IVTTREF=0A
CH1: VS5, 5V/Div, DC
CH2: VS3, 5V/Div, DC
CH3: VTTREF, 500mV/Div, DC
CH4: VTT, 500mV/Div, DC
TIME:100µs/Div
VS5
1
VS 3
2
VTTRE F
3
V TT
4
IVTT=IVTTREF=0A
CH1: VS5, 5V/Div, DC
CH2: VS3, 5V/Div, DC
CH3: VTTREF, 500mV/Div, DC
CH4: VTT, 500mV/Div, DC
TIME:100µs/Div
Shutdown Waveform-S3 High to Low
Shutdown Waveform-S3 and S5 High to Low
VS5
1
VS 3
2
VTTREF
3 VTT
4
IVTT=IVTTREF=0A
CH1: VS5, 5V/Div, DC
CH2: VS3, 5V/Div, DC
CH3: VTTREF, 500mV/Div, DC
CH4: VTT, 500mV/Div, DC
TIME:100µs/Div
Copyright © ANPEC Electronics Corp.
Rev. A.5 - Aug., 2013
VS 5
1
V
S3
2
VTTREF
V
TT
3
4
IVTT=IVTTREF=0A
CH1: VS5, 5V/Div, DC
CH2: VS3, 5V/Div, DC
CH3: VTTREF, 500mV/Div, DC
CH4: VTT, 500mV/Div, DC
TIME:100µs/Div
7 www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
7페이지 | |||
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