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参数资料
| 型号： | LTC3714EG#TR |
| 厂商： | Linear Technology |
| 文件页数： | 11/28页 |
| 文件大小： | 0K |
| 描述： | IC STP-DWN CNTRLR W/OPAMP 28SSOP |
| 标准包装： | 2,000 |
| 应用： | 控制器，Intel Pentium? |
| 输入电压： | 4 V ~ 36 V |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 1.75 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC3714EGTR |
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LTC3714
OPERATION
Internal Op Amp
The internal op amp allows the user to program accurate
offsets to the output voltage during power saving modes.
By connecting the OP + pin to the output, the OPOUT pin
to the V OSENSE pin and an external resistor R1 between
the OP – and OPOUT pins, the op amp is hooked up as
a unity-gain feedback amplifier. Resistors R2 and R3,
together with series switches, can then be placed on the
OP – pin to allow negative offsets to be switched onto the
output voltage (see Figures 2a and 2b). The accuracy of
the offset will depend on the matching of the external
resistors R1 to R2 and R3.*
For applications that require less accurate output offsets,
or none at all, the user can use the internal op amp for
true differential remote sensing of the output voltage by
connecting OPOUT to V OSENSE and using OP + and OP – for
differential sensing across the output capacitor as shown
in Figure 2c.
V OUT
INTV CC /EXTV CC Power
Power for the top and bottom MOSFET drivers and most of
the internal controller circuitry is derived from the INTV CC
pin. The top MOSFET driver is powered from a floating
bootstrap capacitor C B . This capacitor is recharged from
INTV CC through an external Schottky diode D B when
the top MOSFET is turned off. When the EXTV CC pin is
grounded, an internal 5V low dropout regulator supplies
the INTV CC power from V IN . If EXTV CC rises above 4.7V,
the internal regulator is turned off, and an internal switch
connects EXTV CC to INTV CC . This allows a high efficiency
source connected to EXTV CC , such as an external 5V sup-
ply or a secondary output from the converter, to provide
the INTV CC power. Voltages up to 7V can be applied to
EXTV CC for additional gate drive. If the input voltage is
low and INTV CC drops below 3.5V, undervoltage lockout
circuitry prevents the power switches from turning on.
*An alternate configuration, shown in Figure 2b, can be used to program
offsets as well. Either configuration can be used, depending upon the logic
of control signals. If offsets are not required, the op amp can be used to
remotely sense the output voltage, proving true differential sense.
V OUT
OP +
17
OP – 16
+
–
15 OPV IN
OPOUT
18
R1
V OSENSE
23
VID DAC
V FB
22
BATTERY
MODE
OFFSET
R1
R2
OP +
17
OP – 16
+
–
15 OPV IN
18
23
VID DAC
V FB
22
R2
R3
R2
R1
SLEEP
MODE
OFFSET
BATTERY
MODE
OFFSET
3714 F02b
SLEEP
MODE
OFFSET
R3
3714 F02b
Figure 2a
Figure 2b
V OUT
+
R
OP +
17
+
15 OPV IN
OPOUT V OSENSE
R
OP – 16
–
18
23
V OUT–
R
R
3714 F02c
Figure 2c
3714f
11
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| LTC3716EG | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3716EG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3716EG#TR | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 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 |
| LTC3716EG#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3717-1#PBF | 制造商:LINEAR 功能描述: 制造商:Linear Technology 功能描述: |
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