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參數資料
| 型號： | TPS65820RSHTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-56 |
| 文件頁數： | 53/98頁 |
| 文件大小： | 2290K |
| 代理商： | TPS65820RSHTG4 |
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Output Voltage Monitoring
LINEAR REGULATORS — I
2C REGISTERS
www.ti.com .............................................................................................................................................................. SLVS663B – MAY 2006 – REVISED APRIL 2008
Internal power good comparators monitor the LDO outputs and detect when the output voltage is below 90% of
the programmed value. This information is used by the TPS65820 to generate interrupts or to trigger distinct
operating modes, depending on specific I2C register settings. See interrupt and sequencing controller section for
additional details.
The I2C registers that control LDO-related functions are shown below. The HEX address for each register is
shown by the register name, together with the R or W functionality for the register bits. Shaded values indicate
default initial power-up values.
B7
B6
B5
B4
B3
B2
B1
B0
EN_LDO: ADDRESS = B, ALL BITS R/W
Bit name
LDO1_EN
LDO2_EN
LDO3_EN
LDO4_EN
LDO5_EN
SIM_SET
SIM EN1
RTC_EN
Function
LDO1…5 ON/OFF CONTROL
SIM LDO output
SIM/RTC ON/OFF CONTROL
voltage
When 0
OFF
3 V
OFF
When 1
ON
1.8 V
ON
LDO12: ADDRESS = C, ALL BITS R/W
Bit name
LDO1_DISCH
LDO1_2 SET
LDO1_1 SET
LDO1_0 SET
LDO2_DISCH
LDO2_2 SET
LDO2_1 SET
LDO2_0 SET
Function
LDO1 output
LDO1 OUTPUT VOLTAGE SETTING
LDO2 Output
LDO2 OUTPUT VOLTAGE SETTING
discharge switch
discharge
enable
switch enable
When 0
OFF
000 = 1.25 V
001=1.5 V
Default = 2.85 V
OFF
000 = 1.25 V
001 = 1.5 V
Default = 3.3 V
010 = 1.8 V
011=2.5 V
010 = 1.8 V
011 = 2.5 V
When 1
ON
100 = 2.85 V
110=3 V
100 = 2.85 V
110 = 3 V
110 = 3.2 V
111=3.3
110 = 3.2 V
111 = 3.3 V
LDO3, ADDRESS = D, ALL BITS R/W
Bit name
LDO3_DISCH
LDO3_6 SET
LDO3_5 SET
LDO3_4 SET
LDO3_3 SET
LDO3_2 SET
LDO3_1 SET
LDO3_0 SET
Function
LDO3 output
LDO3 OUTPUT VOLTAGE SETTING
discharge switch
enable
When 0
OFF
See Table 10 for LDO3-5 output voltage setting,
Power-up default = 1.25 V
When 1
ON
LDO4, ADDRESS = E, ALL BITS R/W
Bit name
LDO4_DISCH
LDO4_6 SET
LDO4_5 SET
LDO4_4 SET
LDO4_3 SET
LDO4_2 SET
LDO4_1 SET
LDO4_0 SET
Function
LDO4 output
LDO4 OUTPUT VOLTAGE SETTING
discharge switch
enable
When 0
OFF
See Table 10 for LDO3-5 output voltage setting,
Power-up default = 2.75 V
When 1
ON
LDO5, ADDRESS = F, ALL BITS R/W
Bit name
LDO5_DISCH
LDO5_6 SET
LDO5_5 SET
LDO5_4 SET
LDO5_3 SET
LDO5_2 SET
LDO5_1 SET
LDO5_0 SET
Function
LDO5 output
LDO5 OUTPUT VOLTAGE SETTING
discharge switch
enable
When 0
OFF
See Table 10 for LDO3-5 output voltage setting,
Power-up default = 2.81 V
When 1
ON
GPIO3, ADDRESS = 1C, ALL BITS R/W. NOTE: ONLY BIT B5 CONTROLS LDO-RELATED FUNCTIONALITY
Bit name
GPIO3i/O
GPIO3 LEVEL
LDO0 ENABLE
CHARGE
RTC_SET
GPIO2_INTSRC
GPIO1_INTSRC
GPIO2_SM2
_VLTG
Function
SEE Table 17
LDO0 ON/OFF
SEE Battery
RTC_LDO
SEE Table 17
CONTROL
OUTPUT
VOLTAGE
When 0
LDO0 OFF
3.1 V
When 1
LDO0 ON
2.6 V
Copyright 2006–2008, Texas Instruments Incorporated
57
Product Folder Link(s): TPS65820
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