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參數資料
型號: TPS65950ZXNT
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝: 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數: 110/167頁
文件大小: 2566K
代理商: TPS65950ZXNT
4.1.4
VDAC LDO Regulator
4.1.5
VPLL1 LDO Regulator
TPS65950
Integrated Power Management/Audio Codec
www.ti.com
SWCS032 – OCTOBER 2008
The VDAC programmable LDO regulator is a high power-supply ripple rejection (PSRR), low-noise, linear
regulator that powers the host processor dual-video DAC. It is controllable with registers through I2C and
can be powered down. Table 4-5 lists the characteristics of the regulator.
Table 4-5. VDAC LDO Regulator Characteristics
Parameter
Test Conditions
Min(1)
Typ(2) Max(3)
Unit
Output Load Conditions
Filtering capacitor
Connected from VDAC.OUT to analog ground
0.3
1
2.7
F
Filtering capacitor ESR
20
600
m
Electrical Characteristics
VIN
Input voltage
2.7
3.6
4.5
V
VOUT
Output voltage
On mode
1.164
1.2
1.236
V
1.261
1.3
1.339
1.746
1.8
1.854
IOUT
Rated output current
On mode
70
mA
Low-power mode
1
Dc load regulation
On mode: 0 < IO < IMax
20
mV
Dc line regulation
On mode, VIN = VINmin to VINmax at IOUT = IOUTmax
3
mV
Turn-on time
IOUT = 0, CL = 1 F (within 10% of VOUT)
100
s
Wake-up time
Full load capability
10
s
Ripple rejection
f < 20 kHz
65
dB
20 kHz < f < 100 kHz
45
f = 1 MHz
40
VIN = VOUT + 1 V, IO = IMax
Output noise
100 Hz < f < 5 kHz
400
nV/
√Hz
5 kHz < f < 400 kHz
125
400 kHz < f < 10 MHz
50
Ground current
On mode, IOUT = 0
150
A
On mode, IOUT = IOUTmax
350
Low-power mode, IOUT = 0
15
Low-power mode, IOUT = 1 mA
25
Off mode at 55
°C
1
VDO
Dropout voltage
On mode, IOUT = IOUTmax
250
mV
ILoad: IMin – IMax
Transient load regulation
–40
40
mV
Slew: 60 mA/
s
VIN drops 500 mV
Transient line regulation
10
mV
Slew: 40 mV/
s
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
The VPLL1 programmable LDO regulator is high-PSRR, low-noise, linear regulator used for the host
processor phase-locked loop (PLL) supply. Table 4-6 lists the characteristics of the regulator.
Power Module
47
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