- 您现在的位置：买卖IC网 > PDF目录150819 > TPS65023RSB (TEXAS INSTRUMENTS INC) 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 PDF资料下载
参数资料
| 型号： | TPS65023RSB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| 封装： | 5 X 5 MM, PLASTIC, QFN-40 |
| 文件页数： | 17/53页 |
| 文件大小： | 1274K |
| 代理商： | TPS65023RSB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页
SLVS670I – JUNE 2006 – REVISED JULY 2010
www.ti.com
LOW DROPOUT VOLTAGE REGULATORS
The low dropout voltage regulators are designed to operate well with low value ceramic input and output
capacitors. They operate with input voltages down to 1.5 V. The LDOs offer a maximum dropout voltage of
300 mV at rated output current. Each LDO supports a current limit feature. Both LDOs are enabled by the
LDO_EN pin, both LDOs can be disabled or programmed via the serial interface using the REG_CTRL and
LDO_CTRL registers. The LDOs also have reverse conduction prevention. This allows the possibility to connect
external regulators in parallel in systems with a backup battery. The TPS65023, TPS65023B step-down and LDO
voltage regulators automatically power down when the VCC voltage drops below the UVLO threshold or when the
junction temperature rises above 160°C.
POWER GOOD MONITORING
Both the LDO1 and LDO2 linear regulators have power good comparators. Each comparator indicates when the
relevant output voltage has dropped 10% below its target value, with 5% hysteresis. The outputs of these
comparators are available in the PGOODZ register via the serial interface. An interrupt is generated when any
voltage rail drops below the 10% threshold. The comparators are disabled when the LDOs are disabled and the
relevant PGOODZ register bits indicate that power is good.
UNDERVOLTAGE LOCKOUT
The undervoltage lockout circuit for the five regulators on the TPS65023, TPS65023B prevents the device from
malfunctioning at low-input voltages and from excessive discharge of the battery. It disables the converters and
LDOs. The UVLO circuit monitors the VCC pin, the threshold is set internally to 2.35 V with 5% (120 mV)
hysteresis. Note that when any of the dc-dc converters are running, there is an input current at the VCC pin,
which is up to 3 mA when all three converters are running in PWM mode. This current needs to be taken into
consideration if an external RC filter is used at the VCC pin to remove switching noise from the TPS65023,
TPS65023B internal analog circuitry supply.
POWER-UP SEQUENCING
The TPS65023, TPS65023B power-up sequencing is designed to be entirely flexible and customer driven. This is
achieved by providing separate enable pins for each switch-mode converter, and a common enable signal for the
LDOs. The relevant control pins are described in Table 2.
Table 2. Control Pins and Status Outputs for DC-DC Converters
PIN NAME
I/O
FUNCTION
Defines the default voltage of the VDCDC3 switching converter. DEFDCDC3 = 0 defaults VDCDC3 to 1.8 V,
DEFDCDC3
I
DEFDCDC3 = VCC defaults VDCDC3 to 3.3 V.
Defines the default voltage of the VDCDC2 switching converter. DEFDCDC2 = 0 defaults VDCDC2 to 1.8 V,
DEFDCDC2
I
DEFDCDC2 = VCC defaults VDCDC2 to 3.3 V.
Defines the default voltage of the VDCDC1 switching converter. DEFDCDC1 = 0 defaults VDCDC1 to 1.2 V,
DEFDCDC1
I
DEFDCDC1 = VCC defaults VDCDC1 to 1.6 V.
DCDC3_EN
I
Set DCDC3_EN = 0 to disable and DCDC3_EN = 1 to enable the VDCDC3 converter
DCDC2_EN
I
Set DCDC2_EN = 0 to disable and DCDC2_EN = 1 to enable the VDCDC2 converter
DCDC1_EN
I
Set DCDC1_EN = 0 to disable and DCDC1_EN = 1 to enable the VDCDC1 converter
The HOT_RESET pin generates a reset (RESPWRON) for the processor.HOT_RESET does not alter any
TPS65023, TPS65023B settings except the output voltage of VDCDC1. Activating HOT_RESET sets the voltage
HOT_RESET
I
of VDCDC1 to its default value defined with the DEFDCDC1 pin. HOT_RESET is internally de-bounced by the
TPS65023, TPS65023B.
RESPWRON is held low when power is initially applied to the TPS65023, TPS65023B. The VRTC voltage is
RESPWRON
O
monitored: RESWPRON is low when VRTC < 2.4 V and remains low for a time defined by the external capacitor
at the TRESPWRON pin. RESPWRON can also be forced low by activation of the HOT_RESET pin.
TRESPWRON
I
Connect a capacitor here to define the RESET time at the RESPWRON pin (1 nF typically gives 100 ms).
24
Copyright 2006–2010, Texas Instruments Incorporated
Product Folder Link(s) : TPS65023, TPS65023B
相关PDF资料 |
PDF描述 |
|---|---|
| TPS659102A1RSLR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC48 |
| TPS65070TRSLRQ1 | POWER SUPPLY SUPPORT CKT, PQCC48 |
| TS3810CXDRF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| TC151B2012EOA723 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC151A1813EOA713 | 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65023RSBG4 | 制造商:Texas Instruments 功能描述: |
| TPS65023RSBR | 功能描述:电池管理 6Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65023RSBRG4 | 功能描述:电池管理 6Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65023RSBT | 功能描述:电池管理 6-Channel Power Management IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65023RSBT | 制造商:Texas Instruments 功能描述:Power Management IC |
发布紧急采购，3分钟左右您将得到回复。