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参数资料
| 型号： | LTC3828EG |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 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 |
| 封装： | 5.30 MM, PLASTIC, SSOP-28 |
| 文件页数： | 7/32页 |
| 文件大小： | 396K |
| 代理商： | LTC3828EG |
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LTC3828
3828f
7
I
TH1,
I
TH2
(Pins 2, 13/Pins 30, 12):
Error Amplifier Output
and Switching Regulator Compensation Point. Each asso-
ciated channels’ current comparator trip point increases
with this control voltage.
PHSMD (Pin 4, QFN Only):
Control input to phase selector
which determines the phase relationship between control-
ler 1, controller 2 and the clockout signal.
V
OSENSE1
, V
OSENSE2
(Pins 5, 14/Pins 1, 13):
Error Ampli-
fier Feedback Input. Receives the remotely-sensed feed-
back voltage for each controller from an external resistive
divider across the output.
PLLFLTR (Pin 6/Pin 2):
Filter Connection for Phase-
Locked Loop. Alternatively, this pin can be driven with an
AC or DC voltage source to vary the frequency of the
internal oscillator.
FCB/PLLIN
(Pin 8/Pin 5):
Forced Continuous Control
Input
and External Synchronization Input to Phase Detec-
tor
. Pulling this pin below 0.8V will force continuous
synchronous operation. Feeding an external clock signal
will synchronize the LTC3828 to the external clock.
SGND
(Pin 9/Pin 6):
Small Signal Ground. Common
to both controllers, this pin must be routed separately
from high current grounds to the common (–) terminals
of the C
OUT
capacitors.
PIU
TRCKSS2, TRCKSS1 (Pins 10, 1/Pins 7, 29):
Soft-Start
and Output Voltage Tracking Inputs. When one channel is
configured to be the master of two outputs a capacitor to
ground at this pin sets the ramp rate. The slave channel
tracks the output of the master channel by reproducing the
V
FB
voltage of the master channel with a resistor divider
and applying that voltage to its track pin. An internal 1.2
μ
A
soft-start current is always charging these pins.
SENSE2
–
, SENSE1
–
(Pins 11, 4/Pins 10, 32):
The (–)
Input to the Differential Current Comparators.
SENSE2
+
, SENSE1
+
(Pins 12, 3/Pins 11, 31):
The (+)
Input to the Differential Current Comparators. The I
TH
pin
voltage and controlled offsets between the SENSE
–
and
SENSE
+
pins in conjunction with R
SENSE
set the current
trip threshold.
RUN2, RUN1 (Pins 15, 7/Pins 14, 3):
Run Control Inputs.
Forcing RUN pins below 1V would shut down the circuitry
required for that particular channel. Forcing the RUN pins
over 2V would turn on the IC.
BOOST2, BOOST1 (Pins 16, 26/Pins 15, 26):
Bootstrapped
Supplies to the Top Side Floating Drivers. Capacitors are
connected between the boost and switch pins and Schot-
tky diodes are tied between the boost and INTV
CC
pins.
Voltage swing at the boost pins is from INTV
CC
to (V
IN
+
INTV
CC
).
(SSOP/QFN)
TYPICAL PERFOR U
3828 G25
V
OUT
20mV/DIV
I
L
1A/DIV
100
μ
s/DIV
V
IN
= 12V
V
OUT
= 5V
V
FCB
= OPEN
I
OUT
= 20mA
3828 G26
V
OUT
20mV/DIV
I
L
0.5A/DIV
2
μ
s/DIV
V
IN
= 12V
V
OUT
= 5V
V
FCB
= 5V
I
OUT
= 20mA
Burst Mode Operation
(Figure 14)
Constant Frequency (Burst
Inhibit) Operation (Figure 14)
T
A
= 25
°
C unless otherwise noted.
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相关代理商/技术参数 |
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| LTC3828EG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC3828EG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称: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 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3828EUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
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