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參數(shù)資料
| 型號(hào)： | RE025 |
| 英文描述： | RE025 [Updated 2/03. 10 Pages] The RE025 is a Low Drop Out (LDO) voltage regulator macrocell with programmable 2.8V or 2.9V output voltages. rated for loads of up to 30 mA. A typical application is radio section supply in mobile terminals. |
| 中文描述： | RE025 [更新2月3日。 10頁(yè)]的RE025是一個(gè)低壓差（LDO）穩(wěn)壓器穩(wěn)壓器宏單元可編程2.8V的輸出電壓或2.9V為止。額定高達(dá)30毫安的負(fù)載。一個(gè)典型的應(yīng)用是在無線移動(dòng)終端的部分供應(yīng)。 |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 131K |
| 代理商： | RE025 |
1
Features
Low-noise Low Drop Out Voltage Regulator
Programmable at 2.8V or 2.9V Output Voltages
3V to 5.5V Supply Operation
30 mA Maximum Load Current
Power-down Mode Consumption Less Than 1 μA
Macrocell for Integration into System-on-chip Products
More Than 70 dB (Typical) PSRR at 1 kHz
32μ V
RMS
Output Noise
0.35 μm CMOS Technology
Typical Application: Radio Section Supply in Mobile Terminals
Description
RE025 is a Low Drop Out (LDO) voltage regulator macrocell with programmable 2.8V
or 2.9V output voltages, rated for loads of up to 30 mA. It is designed to be integrated
with other analog cells, digital logic, microcontrollers, DSP cores and memory blocks
into system-on-chip products.
The circuit consists of a PMOS pass device, an error amplifier and a feedback resis-
tive network, sized to achieve the required closed loop gain. These blocks make up
the regulating loop. An over-current and short circuit protection circuit has been
included to limit the output current delivered by the regulator, thus avoiding destruction
in case of a short circuit.
An external reference voltage (bandgap voltage) is necessary for correct functionality.
The target reference voltage is 1.231V, delivered, for example, by BG019. Double
pads on the supply voltage V
BAT3A
/V
BAT3AA
and output voltage V
PLLA
/V
PLLAA
are used to
reduce the total output resistance. Current reference is generated inside the cell
through a circuit supplied by a 2.5V ± 0.1V regulated input voltage on V
SAUVC
. Remote
sense terminal V
PLLS
provides regulation at the load by connecting it to the output ter-
minal near a critical point to improve performance of the regulator (e.g., connecting
them at the package pin by double-bonding thus avoiding the bonding resistance influ-
ence). A ceramic capacitor of 2.2 μF connected from V
PLLA
/V
PLLAA
to ground is needed
as external compensation.
Figure 1.
Symbol
(1)
Note:
1. Pin names are written as they appear on the user screen when the symbol is
opened in the design tool environment.
vsauvc
vbg
on3
trimldo3
vpllc
vbat3a
vbat3aa
vplla
vpllaa
vplls
gnd3
Embedded ASIC
Macrocell:
Power
Management for
Mobile
Terminals (PM)
RE025
Programmable
2.8V or 2.9V
30 mA
Low-noise LDO
Voltage
Regulator
Rev. 2700B-PMGMT–02/03
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參數(shù)描述 |
|---|---|
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