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參數(shù)資料
| 型號(hào)： | ADP3157JR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5-Bit Programmable Synchronous Controller for Pentium III Processors |
| 中文描述： | SWITCHING CONTROLLER, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大?。?/td> | 173K |
| 代理商： | ADP3157JR |
REV. A
ADP3157
–3–
PIN FUNCTION DESCRIPTIONS
Pin No.
Mnemonic
Function
1–4, 16
VID1–VID4,
Voltage Identification DAC Inputs. These pins are pulled up to an internal reference, providing a logic
VID0
one if left open. The DAC output programs the SENSE– regulation voltage from 1.3 V to 3.5 V. Leav-
ing all five DAC inputs open results in placing the ADP3157 into shutdown.
5
AGND
Analog Ground. All internal signals of the ADP3157 are reference to this ground.
6
SD
Shutdown. A logic high will place the ADP3157 in shutdown and disable both outputs. This pin is
internally pulled down.
7
SENSE–
Connects to the internal resistor divider that senses the output voltage. This pin is also the (–) input
for the current comparator.
8
SENSE+
The (+) input for the current comparator. The output current is sensed as a voltage at this pin with
respect to SENSE–.
9CT
External capacitor CT connection to ground sets the off time of the device.
10
CMP
Error Amplifier output and compensation point. The voltage at this output programs the output cur-
rent control level between the SENSE pins.
11
PWRGD
Power Good. An open drain signal indicates that the output voltage is within a
±5% regulation band.
12
VCC
Supply Voltage to ADP3157.
13
DRIVE2
Gate Drive for the (bottom) synchronous rectifier N-channel MOSFET. The voltage at DRIVE2
swings from ground to VCC.
14
DRIVE1
Gate Drive for the buck switch N-channel MOSFET. The voltage at DRIVE1 swings from ground to
VCC.
15
PGND
Power Ground. The drivers turn off the buck and synchronous MOSFETs by discharging their gate
capacitances to this pin. PGND should have a low impedance path to the source of the synchronous
MOSFET.
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
ADP3157
SENSE–
VID2
VID3
VID4
SD
AGND
SENSE+
CT
CMP
PGND
DRIVE1
PWRGD
VCC
DRIVE2
VID1
VID0
ABSOLUTE MAXIMUM RATINGS*
Input Supply Voltage (VCC) . . . . . . . . . . . . . . –0.3 V to +16 V
VID0–VID4, SD, PWRGD, CMP, CT . . . . . . . –0.3 V to VCC
DRIVE1, DRIVE2, SENSE+, SENSE– . . . . . . –0.3 V to VCC
Operating Ambient Temperature Range . . . . . . 0
°C to +70°C
Junction Temperature Range . . . . . . . . . . . . . . 0
°C to +150°C
θ
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
°C/W
Storage Temperature Range . . . . . . . . . . . . –65
°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300
°C
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.
ORDERING GUIDE
Temperature
Package
Model
Range
Description
Options
ADP3157JR
0
°C to +70°C
16-Lead SOIC
R-16A/SO-16
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3157 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
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相關(guān)代理商/技術(shù)參數(shù) |
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| ADP3157JR-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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| ADP3158JR-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| ADP3159 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Bit Programmable Synchronous Buck Controllers |
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