DataSheet.jp

SC2443 の電気的特性と機能

SC2443のメーカーはSemtech Corporationです、この部品の機能は「Dual-Phase Single or Two Output Synchronous Step-Down Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 SC2443
部品説明 Dual-Phase Single or Two Output Synchronous Step-Down Controller
メーカ Semtech Corporation
ロゴ Semtech Corporation ロゴ 




このページの下部にプレビューとSC2443ダウンロード(pdfファイル)リンクがあります。

Total 20 pages

No Preview Available !

SC2443 Datasheet, SC2443 PDF,ピン配置, 機能
POWER MANAGEMENT
Features
u Wide input voltage range: 4.7V to 16V
u 0.5V feedback voltage for low-voltage outputs
u Programmable frequency up to 1 MHz per phase
u 2-Phase synchronous continuous conduction mode for
high efficiency step-down converters
u Out-of-phase operation for low input current ripples
u Output source and sink currents
u Fixed frequency peak current-mode control
u 75mV/-110mV maximum current sense voltage
u Inductor DCR current-sensing for low-cost applications
u Dual outputs or 2-phase single output operation
u Excellent current sharing between individual phases
u Individual soft-start, overload shutdown and enable
u External reference input for DDR applications
u External synchronization
u Industrial temperature range
u 4mm X 4mm X1mm 24-lead MLPQ package
Applications
u Telecommunication power supplies
u DDR memory power supplies
u Graphic power supplies
u Servers and base stations
Typical Application Circuit
SC2443
Dual-Phase Single or Two Output
Synchronous Step-Dowwwwn.DaCtaSohenet4tUr.coomller
Description
The SC2443 is a high-frequency dual synchronous step-down
switching power supply controller. It provides out-of-phase
high-current output gate drives to all N-channel MOSFET power
stages. The SC2443 operates in synchronous continuous-con-
duction mode. Both phases are capable of maintaining regula-
tion with sourcing or sinking load currents, making the SC2443
suitable for generating both VDDQ and the tracking VTT for
DDR applications.
The SC2443 employs fixed frequency peak current-mode con-
trol for the ease of frequency compensation and fast transient
response.
The dual-phase step-down controllers of the SC2443 can be
used to produce two individually controlled and regulated out-
puts or a single output with shared current in each phase. The
Step-down controllers operate from an input of at least 4.7V
and are capable of regulating outputs as low as 0.5V
Individual soft-start and overload shutdown timer is included
in each step-down controller. The SC2443 implements hiccup
overload protection. In single output current share configura-
tion, the master timer controls the soft-start and overload shut-
down functions of both controllers.
VOUT1 VP1
VIN
U1
IN1- 1 IN1-
2 COMP1
3 SYNC
4 AGND
SC2443
5 REF
6 REFIN
GDL1 18
PVCC 17
PGND 16
GDL2 15
GDH2 14
BST2 13
VIN
VP1 VOUT1
IN1-
VIN
VOUT2
IN2-
VIN
IN2-
Dual Independent Outputs
July 09 2007
VOUT1 VP1
VIN
U1
IN1- 1 IN1-
2 COMP1
3 SYNC
4 AGND
SC2443
5 REF
6 REFIN
GDL1 18
PVCC 17
PGND 16
GDL2 15
GDH2 14
BST2 13
VIN
VP1 VOUT1
IN1-
VIN
VIN
Single Output With Current Sharing


1 Page





SC2443 pdf, ピン配列
SC2443
Absolute Maximum Ratings
AVCC, PVCC Voltage …………………………… -0.3 to 20V
VBST1, VBST2 Voltage ……………………………… -0.3 to 32V
SS1/EN1, SS2/EN2, SYNC Voltage ……………… -0.3 to 6V
IN1-, IN2-, REF Voltage ………………… -0.3 to AVCC+ 0.3V
REFIN , COMP1, COMP2 Voltage ………… -0.3 to AVCC+ 0.3V
CS1+, CS1-, CS2+, CS2- Voltage ………… -0.3 to AVCC+ 0.3V
PGND to AGND ……………………………………… ± 0.3V
Peak IR Reflow Temperature …………………………… 260°C
www.DataSheet4U.com
Recommended Operating Conditions
Input Voltage Range ………………………… 4.75V to 16V
Thermal Information
Junction to Ambient(1) …………………………… 29°C/W
Maximum Junction Temperature ……………………… 150°C
Storage Temperature ………………………… -65 to +150°C
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES-
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) This device is ESD sensitive. Use of standard ESD handing precautions is required
Electrical Characteristics
Unless otherwise specified: AVCC = PVCC = 12V, VBST1 = VBST2 = 12V, SYNC = 0V, -40°C < TA = TJ < 85°C, ROSC =51.1kW.
Parameter
Symbol
Conditions
Min Typ
Undervoltage Lockout
AVCC Start Threshold
AVCC Start Hysteresis
AVCC Operating Current
AVCC Quiescent Current in UVLO
Channel 1 Error Amplifier
Non-inverting Input Voltage
Non-inverting Input Line Regulation
Input Offset Voltage
Inverting Input Bias Current
Amplifier Transconductance
Amplifier Open Loop Gain
Amplifier Unity Gain Bandwidth
COMP1 Switching Threshold
Amplifier Output Sink Current
Amplifier Output Source Current
AVCCTH
AVCCHYST
ICC
Iq
VIN1+
IIN1-
GM1
AOL1
AVCC rising
AVCC = AVCCTH - 0.2V
AVCCTH < AVCC < 15V
VCS1+=VCS1- = 0, VSS1 Rising
VIN1- = 1V, VCOMP1 = 2.5V
VIN1- = 0V, VCOMP1 = 2.5V
4.5
170
12
1.7
0.49 0.5
1
-0.1
260
65
5
2.2
16
12
Max Units
4.7 V
mV
16 mA
mA
0.51
0.02
-0.25
V
%/V
mV
µA
µW-1
dB
MHz
V
µA
µA



3Pages


SC2443 電子部品, 半導体
Typical Characteristics
UVLO Threshold vs. Temperature
4.55
4.54
4.53
4.52
4.51
4.50
4.49
-40 25 85
Temperature (OC)
VREF vs. Temperature
502.0
501.5
501.0
500.5
500.0
499.5
499.0
-40 25
85
Temperature (OC)
COMP switching Threshold vs.
Temperature
2.35
2.30
2.25
2.20
2.15
2.10
2.05
-40 25
85
Temperature (OC)
SS/EN Threshold for Overload Hiccup vs.
Temperature
3.18
3.17
3.16
3.15
3.14
3.13
3.12
3.11
3.10
-40 25 85
Temperature (OC)
AVCC operation current vs.
Temperature
12.9
12.8
12.7
12.6
12.5
12.4
12.3
12.2
12.1
12
-40 25
85
Temperature (OC)
COMP Sink/Source current vs.
Temperature
20
15 SINK
10
5
0
-5
SOURCE
-10
-15
-40 25
85
Temperature (OC)
Switching Frequency setting vs.
Temperature
512
510
508
506
504
502
500
498 ROSC = 51.1KW
496
-40 25 85
Temperature (OC)
SS/EN Threshold for Gate Driver
Enable / Disable vs. Temperature
1.30
1.25 Enable
1.20
1.15
1.10
1.05
1.00
0.95
0.90
Disable
0.85
0.80
-40 25 85
Temperature (OC)
SC2443
www.DataSheet4U.com
AVCC current in UVLO vs.
Temperature
1.85
1.80
1.75
1.70
1.65
1.60
1.55
-40 25
85
Temperature (OC)
E/A GM vs. Temperature
290
280
270
260
250
240
230
220
-40 25 85
Temperature (OC)
Cycle by Cycle OCP threshold vs.
Temperature
75.0
74.5
74.0
73.5
73.0
72.5
72.0
71.5
71.0
-40 25 85
Temperature (OC)
SS/EN Threshold for Overload
Hiccup Recovery vs. Temperature
0.58
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.42
-40 25
85
Temperature (OC)


6 Page



ページ 合計 : 20 ページ
 
PDF
ダウンロード
[ SC2443 データシート.PDF ]


データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


部品番号部品説明メーカ
SC2440

2.5 MHz Dual Switching Regulator

Semtech Corporation
Semtech Corporation
SC2441

Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation
Semtech Corporation
SC2441A

1.8V to 20V Input 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation
Semtech Corporation
SC2442

High Performance Wide Input Range Dual Synchronous Buck Controller

Semtech Corporation
Semtech Corporation


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap