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参数资料
| 型号： | S-1701B3024-M5T1U |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.21 V DROPOUT, PDSO5 |
| 封装： | HALOGEN FREE AND LEAD FREE, SOT-23, 5 PIN |
| 文件页数： | 37/71页 |
| 文件大小： | 582K |
| 代理商： | S-1701B3024-M5T1U |
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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Rev.3.0_00
Seiko Instruments Inc.
42
Detector block
1. Basic operation
Figure 36 shows a block diagram of the detector block.
Ra
Rb
Rc
*1
*1.
Parasitic diode
VSS
Current
supply
+
VIN
VSENSE
Vref
N1
VDOUT
Nch
Delay circuit
Figure 36 Block Diagram (Detector Block)
(1) When the SENSE voltage (VSENSE) is higher than the release voltage (
+VDET), the Nch transistor is OFF and VIN
(high) is output.
Since the Nch transistor N1 in Figure 36 is OFF, the comparator input voltage is
(Rb
+Rc) VSENSE
Ra
+Rb+Rc
.
(2) When VSENSE goes below
+VDET, VIN is output, as long as VSENSE remains above the detection voltage (VDET).
When the VSENSE falls below
VDET, the Nch transistor becomes ON and VSS is output. At this time, the Nch
transistor N1 in Figure 36 becomes ON, and the comparator input voltage is changed to
Rb
VSENSE
Ra
+Rb
.
(3) When VIN falls below the minimum operating voltage, the output becomes undefined. In this case the output
becomes VIN because it is pulled up.
(4) VSS is output when VIN rises above the minimum operating voltage. The VSS level still appears even when VSENSE
surpasses
VDET, as long as it does not exceed the release voltage +VDET. When VSENSE rises above +VDET, the
Nch transistor becomes OFF and VIN is output. VIN at the VDOUT pin is delayed for tD due to the delay circuit.
(5) In the S-1701 Series, the detection voltage can be set within the range of 1.5 V to 5.5 V (operating voltage range:
0.8 V to 6.5 V).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S-1701B3024-U5T1G | 功能描述:低压差稳压器 - LDO Combo Volt Detec/Reg 85uA Iq 400mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-1701B3025-M5T1G | 功能描述:低压差稳压器 - LDO Combo Volt Detct/Reg 85uA Iq 400mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-1701B3025-U5T1G | 功能描述:低压差稳压器 - LDO Combo Volt Detec/Reg 85uA Iq 400mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-1701B3026-M5T1G | 功能描述:低压差稳压器 - LDO Combo Volt Detct/Reg 85uA Iq 400mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-1701B3026-U5T1G | 功能描述:低压差稳压器 - LDO Combo Volt Detec/Reg 85uA Iq 400mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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