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參數(shù)資料
| 型號： | TPS65040ZQER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA71 |
| 封裝： | 5 X 5 MM, 0.50 MM PITCH, GREEN, PLASTIC, MICRO, BGA-71 |
| 文件頁數(shù)： | 51/73頁 |
| 文件大小： | 1928K |
| 代理商： | TPS65040ZQER |
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VTCXO
SLVS708B – NOVEMBER 2006 – REVISED APRIL 2007
can be controlled through the serial interface are r[PSCNTGGE3], r[GGEmodecnt], r[GGE3psmode]; the default
is 1. Note that the electrical characteristics of this LDO are not assured within the range of 3 V < VBAT< 3.1 V
function. Moreover, the output voltage decreases by VBAT–VSAT when VBAT decreases. Turn off this LDO, or
use the low-power mode in the condition where VBAT<3 V. On/off control of VGGE3_V28A and the switch
control of normal mode/low-power mode are shown in Table 11.
Table 11. VGGE3_V28 ON/OFF and Normal Mode/Low Power Mode Control
REG_EN(1)
r[PSCNTGGE3]
r[GGEmodecnt]
r[GGE3psmode]
SYSCLK_EN2
VGGE3_V28
1
VIO1V8 is off
Don't Care
Normal Mode
1
Don't Care
Normal Mode
1
0
Don't Care
Low Power Mode
1
0
Don't Care
1
Normal Mode
1
0
Don't Care
0
Low Power Mode
0
1
Don't Care
OFF
1
0
Don't Care
OFF
0
Don't Care
OFF
(1)
REG_EN sequence is described in SEQUENCE CONTROL.
VTCXO is a high-performance LDO that outputs 2.85 V. This LDO provides the power supply for the clock
distribution circuit in TPS65040, and VCTCXO is external. This LDO stops output PMOS when the load current
exceeds the limit value of the current-limit protection circuit, and then the power supply is shut down. When the
load current falls below the limit values current limit is released. This LDO has two modes which are low-current
mode and high-current mode in normal mode. The low-current mode and high-current mode correspond to
light-load and heavy-load conditions, respectively. The modes are changed automatically. This LDO on/off is
controlled with the SYSCLK_EN pin. Note that the electrical characteristics of this LDO are not assured within
the range of 2.7 V < VBAT < 3.1 V function. Moreover, the output voltage decreases by VBAT–VSAT when
VBAT decreases. Turn off this LDO when not using it. On/Off control of VTCXO is shown in Table 12. Figure 78
shows a block diagram.
Table 12. VTCXO ON/OFF Control
REG_EN(1)
SYSCLK_EN
VTCXO
1
ON
1
0
OFF
0
Don't Care
OFF
(1)
REG_EN sequence is described in SEQUENCE CONTROL.
55
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