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參數(shù)資料
| 型號(hào)： | RE031 |
| 英文描述： | RE031 [Updated 3/03. 10 Pages] A dual mode Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.5V output voltage. rated for loads of up to 5 mA. A typical application is real-time clock. backup battery supply in mobile terminals. |
| 中文描述： | RE031 [更新3月3日。 10頁(yè)]雙模式的低壓差（LDO）穩(wěn)壓器電壓固定的2.5V輸出電壓調(diào)節(jié)器宏單元。額定高達(dá)5毫安的負(fù)載。一個(gè)典型的應(yīng)用是實(shí)時(shí)時(shí)鐘。在移動(dòng)終端的備用電池供電。 |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 123K |
| 代理商： | RE031 |
1
Features
Low Quiescent Current, Low Drop Out Voltage Regulator
2.5V Fixed Output Voltage
3V to 5.5V Supply Operation
5 mA Maximum Load Current
Power-down Mode Consumption Less Than 1 μA
0.35 μm CMOS Technology
Typical Application: Real Time Clock (RTC), Backup Battery Supply in Mobile
Terminals
Maximum Current Consumption 10 μA
Description
RE031 is a Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.5V output
voltage, rated for loads up to 5 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 internal reference voltage (bandgap voltage) has been
included. The target reference voltage is 1.2V, with a tolerance of 4%, delivered by an
external trimming code. Current reference is generated inside the cell through a circuit
supplied by V
BAT
. The remote sense terminal, V
SAUVS
, provides regulation at the load,
by connecting it together with the output terminal, V
SAUV
,, near a critical point to
improve the regulation performance (e.g., connecting them at the package pin by dou-
ble bonding thus avoiding the bonding resistance influence). A capacitor of 2.2 μF
connected from V
SAUV
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
vbg20
rst
gnd2
vsauvs
vsauv
BG020
trimbg20[9:0]
vbat2a
Embedded ASIC
Macrocell:
Power
Management for
Mobile
Terminals (PM)
RE031
Fixed 2.5V
5 mA
Low Quiescent
Current
LDO Voltage
Regulator
Rev. 2707B–PMGMT–03/03
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