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| 型號(hào)： | PWL6030B1AECMR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA187 |
| 封裝： | 7 X 7 MM, 0.40 MM PITCH, GREEN, FCBGA-187 |
| 文件頁數(shù)： | 37/97頁 |
| 文件大小： | 937K |
| 代理商： | PWL6030B1AECMR |
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SWCS045B
– SEPTEMBER 2010 – REVISED JUNE 2011
Input Capacitor Selection
Because the buck converter has a pulsating input current, a low ESR input capacitor must prevent large voltage
transients that can cause misbehavior of the device or interferences with other circuits in the system. Although a
2.2-
F capacitor is sufficient for most applications, a 4.7-F capacitor is recommended to improve input noise
filtering.
CAUTION
Exercise caution when using ceramic input capacitors. When a ceramic capacitor is
used at the input and the power is being supplied through long wires, such as from a
wall adapter, a load step at the output can induce ringing at the VIN pin. This ringing
can couple to the output and can be mistaken as loop instability or even damage the
part. In this circumstance, additional bulk capacitance (electrolytic or tantalum) must be
placed between CI and the power source lead to reduce ringing that can occur
between the inductance of the power source leads and CI.
VCORE1, VCORE2, VCORE3
The TWL6030 device includes three SMPS converters (VCORE1, VCORE2, and VCORE3) intended to provide
three independent core voltage domains to the host processor. All three SMPSs are buck converters with a
configurable output voltage. Default output voltage at power up is 0.95 V (EPROM settings). These three
converters are SmartReflex class 3 compliant; their output voltages are independently controlled using the
SmartReflex I2C dedicated interface (SR-I2C) or control I2C (CTL-I2C) thru registers.
VMEM
The TWL6030 device includes an SMPS buck converter VMEM dedicated to memory supply. For example, the
output voltage of this SMPS can be 1.8 V, 1.35 V, or 1.2 V.
V2V1
One SMPS V2V1 is dedicated to step the battery voltage down to a preregulated voltage of either 1.8 V or 2.1 V,
essentially to supply the TWL6040 (audio) device but also as an input for some LDOs (for example, VCXIO and
VDAC) to improve overall platform power efficiency.
V1V29, V1V8
V1V29 operates at a fixed output voltage to supply an external modem or an RF transceiver and/or 1.2-V I/Os.
V1V8 SMPS is dedicated to a 1.8-V general-purpose supply (standard I/Os, external peripheral, etc.).
When used as system 1.8-V I/Os, the TWL6030 device I/O supply (VIO ball) must be connected to V1V8.
LDO REGULATORS
All LDOs are integrated so that they can be connected to an internal preregulator, to an external buck boost
SMPS, or to another preregulated voltage source.
All LDOs output voltages can be selected, regardless of the LDO input voltage level VIN. There is no hardware
protection to prevent software from selecting an improper output voltage if the VIN minimum level is lower than
TDCOV (total DC output voltage) + DV (dropout voltage). In such conditions, the output voltage would be lower and
nearly equal to the input supply. For example, in electrical tables, only the possible input supplies, which fulfill the
electrical performances in all their ranges, are mentioned at each selected output. Software must not select the
2.5-V output voltage if the VBAT supply is used as the input voltage and VBAT is lower than TDCOV + DV.
The regulator output voltage cannot be modified on the fly, from the 1.0
–2.1 V voltage range to the other 2.2–3.3
V voltage range and vice versa. The regulator must be restarted in these cases.
If an LDO is not needed and not turned-on by software or a switch-on sequence, the external components can
be removed. The TWL6030 device is not damaged by this configuration, and the other functions do not depend
on the unmounted LDOs and continue to work.
42
Copyright
2010–2011, Texas Instruments Incorporated
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