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參數資料
| 型號： | TPS65920A2ZCHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA139 |
| 封裝： | 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139 |
| 文件頁數： | 45/115頁 |
| 文件大小： | 1232K |
| 代理商： | TPS65920A2ZCHR |
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SWCS037G
– MAY 2008 – REVISED APRIL 2011
4.1.3
VIO dc-dc Regulator
4.1.3.1
VIO dc-dc Regulator Characteristics
The I/O and memory dc-dc regulator is a 600-mA stepdown dc-dc converter (internal FET) with two output
voltage settings. It supplies the memories and all I/O ports in the application and is one of the first power
providers to switch on in the power-up sequence. This dc-dc regulator can be placed in sleep or
power-down mode; however, care must be taken in the sequencing of this power provider, because
numerous ESD blocks are connected to this supply. Table 4-5 describes the regulator characteristics.
Table 4-5. VIO dc-dc Regulator Characteristics
Parameter
Comments
Min
Typ
Max
Unit
Input voltage range
2.7
3.6
4.5
V
1.8
Output voltage(1)
V
1.85
–4%
4%
Output accuracy (2)
–3%
3%
Switching frequency
3.2
MHz
IO = 10 mA, sleep
85%
Conversion efficiency(3) Figure 4-6 in active mode
100 mA
< IO < 400 mA
85%
400 mA
< IO < 600 mA
80%
On mode
700
mA
Output current
Sleep mode
10
Ground current (IQ)
Off at 30
°C
1
μA
Sleep, unloaded
50
Active, unloaded, not switching
300
Load transient(4)
50
mV
Line transient
300 mVPP ac, input rise and fall time 10 μs
10
mV
Start-up time
0.25
1
ms
Recovery time
From sleep mode to on mode with constant
<10
100
μs
load
Output shunt resistor (internal pulldown)
500
700
Value
0.7
1
1.3
μH
External coil
DCR
0.1
Saturation current
900
mA
Value
8
10
12
μF
External capacitor
ESR at switching frequency
1
20
m
(1)
This voltage is tuned according to the platform and transient requirements.
(2)
±4% accuracy includes all the variation (line and load regulation, line and load transient, temperature, process)
±3% accuracy is dc accuracy only.
(3)
VBAT = 3.8 V, VIO = 1.8 V, Fs = 3.2 MHz, L = 1
μH, LDCR = 100 m, C = 10 μF, ESR = 10 m
(4)
Load transient can also be specified as 0
< IO < IOUTmax/2, Δt = 1 μs, 100 mV but this is not included in ±4% accuracy.
Copyright
2008–2011, Texas Instruments Incorporated
Power Module
35
focus.ti.com: TPS65930/TPS65920
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| TPS65920BZCH | 功能描述:開關變換器、穩壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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| TPS65921B1ZQZ | 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65921B1ZQZR | 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
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