參數(shù)資料
型號: LTC3828EG
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Dual 2-Phase Step-Down Controller with Tracking
中文描述: 3 A DUAL SWITCHING CONTROLLER, 590 kHz SWITCHING FREQ-MAX, PDSO28
封裝: 5.30 MM, PLASTIC, SSOP-28
文件頁數(shù): 13/32頁
文件大小: 396K
代理商: LTC3828EG
LTC3828
3828f
13
(Refer to Functional Diagram)
OPERATIOU
TIME
(4a) Coincident Tracking
V
OUT1
V
OUT2
O
TIME
3828 F04
(4b) Ratiometric Tracking
V
OUT1
V
OUT2
O
Figure 4. Two Different Modes of Output Voltage Tracking
APPLICATIOU
Output Voltage Tracking
The LTC3828 allows the user to program how the channel
outputs ramp up and down by means of the TRCKSS pins.
Through these pins, the channel outputs can be set up to
either coincidentally or ratiometrically tracking, as shown
in Figure 4.
The TRCKSS pins act as clamps on the channels’ refer-
ence voltages. V
OUT
is referenced to the TRCKSS voltage
when the TRCKSS < 0.8V and to the internal precision
reference when TRCKSS > 0.8V.
W
U
U
INPUT VOLTAGE (V)
0
I
3.0
2.5
2.0
1.5
1.0
0.5
0
10
20
30
40
3828 F03
SINGLE PHASE
DUAL CONTROLLER
2-PHASE
DUAL CONTROLLER
V
O1
= 5V/3A
V
O2
= 3.3V/3A
Figure 3. RMS Input Current Comparison
To implement the tracking in Figure 4a, connect an extra
resistive divider to the output of the master channel and
connect its midpoint to the slave channel’s TRCKSS pin.
The ratio of this divider should be selected the same as that
of channel 2’s feedback divider (Figure 5).
In this tracking
mode, the master channel’s output must be set higher
than slave channel’s output
. To implement the ratiomet-
ric tracking in Figure 4b, no extra divider is needed; simply
connect one of TRCKSS pins to the other channel’s V
FB
pin
(Figure 5).
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相關代理商/技術參數(shù)
參數(shù)描述
LTC3828EG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP(0.173",4.40mm 寬) 包裝:帶卷 (TR)
LTC3828EG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3828EUH 制造商:Linear Technology 功能描述:DC DC Cntrlr Dual-OUT Sync Step Down 4.5V to 28V Input 32-Pin QFN EP
LTC3828EUH#PBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3828EUH#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX