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| 型号： | TPS70758PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封装： | GREEN, PLASTIC, HTSSOP-20 |
| 文件页数： | 2/38页 |
| 文件大小： | 626K |
| 代理商： | TPS70758PWPR |
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Detailed Description
Pin Functions
Enable
Sequence
TPS70745, TPS70748
TPS70751, TPS70758
TPS70702
SLVS291D – MAY 2000 – REVISED DECEMBER 2007
Table 1. TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
EN
6
I
Active low enable
GND
8
—
Ground
MR1
4
I
Manual reset input 1, active low, pulled up internally
MR2
5
I
Manual reset input 2, active low, pulled up internally
NC
1, 11, 20
—
No connection
Open drain output, low when VOUT1 voltage is less than 95% of the nominal regulated
PG1
16
O
voltage
RESET
15
O
Open drain output, SVS (power-on reset) signal, active low
Power-up sequence control: SEQ = High, VOUT2 powers up first;
SEQ
7
I
SEQ = Low, VOUT1 powers up first, SEQ terminal pulled up internally.
VIN1
2, 3
I
Input voltage of regulator 1
VIN2
9, 10
I
Input voltage of regulator 2
VOUT1
18, 19
O
Output voltage of regulator 1
VOUT2
12, 13
O
Output voltage of regulator 2
VSENSE2/FB2
14
I
Regulator 2 output voltage sense/regulator 2 feedback for adjustable
VSENSE1/FB1
17
I
Regulator 1 output voltage sense/regulator 1 feedback for adjustable
The TPS707xx low dropout regulator family provides dual regulated output voltages for DSP applications that
require high-performance power management solutions. These devices provide fast transient response and high
accuracy with small output capacitors, while drawing low quiescent current. Programmable sequencing provides
a power solution for DSPs without any external component requirements. This architecture reduces the
component cost and board space while increasing total system reliability. The TPS707xx family has an enable
feature that puts the device in sleep mode, reducing the input currents to less than 3
A. Other features are
integrated SVS (Power-On Reset, RESET) and Power Good (PG1) that monitor output voltages and provide
logic output to the system. These differentiated features provide a complete DSP power solution.
The TPS707xx, unlike many other LDOs, feature very low quiescent current that remains virtually constant even
with varying loads. Conventional LDO regulators use a pnp pass element, the base current of which is directly
proportional to the load current through the regulator (IB = IC/β). The TPS707xx uses a PMOS transistor to pass
current; because the gate of the PMOS is voltage=driven, operating current is low and stable over the full load
range.
The EN terminal is an input that enables or shuts down the device. If EN is at a voltage high signal, the device is
in shutdown mode. When EN goes to voltage low, the device is enabled.
The SEQ terminal is an input that programs which output voltage (VOUT1 or VOUT2) turns on first. When the device
is enabled and the SEQ terminal is pulled high or left open, VOUT2 turns on first and VOUT1 remains off until VOUT2
reaches approximately 83% of its regulated output voltage. At that time, VOUT1 is turned on. If VOUT2 is pulled
below 83% (for example, in an overload condition) VOUT1 is turned off. These terminals have a 6-A pullup
current to VIN1.
Pulling the SEQ terminal low reverses the power-up order and VOUT1 is turned on first. For detailed timing
diagrams, refer to Figure 36 through Figure 40.
10
Copyright 2000–2007, Texas Instruments Incorporated
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| TPS70758PWPRG4 | 功能描述:低压差稳压器 - LDO Dual-Output LDO 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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| TPS70802PWP | 制造商:Texas Instruments 功能描述:IC DUAL ADJ LDO 20-HTSSOP 制造商:Texas Instruments 功能描述:IC, DUAL ADJ LDO 20-HTSSOP |
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