參數(shù)資料
型號: 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]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。一個典型的應(yīng)用是實時時鐘。在移動終端的備用電池供電。
文件頁數(shù): 4/8頁
文件大小: 123K
代理商: RE031
4
RE031 2.5V 5 mA LDO Voltage Regulator
2707B–PMGMT–03/03
Control Modes
Trimming
The bandgap inside RE031 has trimming capability, i.e., it is possible to compensate the
bandgap resistance variations due to process gradients through the TRIMBG20[9:0] sig-
nal. In order to reduce the sensitivity of the bandgap voltage to resistance varitions, the
trimming has been designed to compensate up to ±40% of resistance variations.
Application Example
A ceramic capacitor of 2.2 μF with ESR between 20 m
and 250 m
connected from
V
SAUV
to ground is needed for external compensation.
Figure 3.
Application Example
Table 2.
Truth Table
Resistance Variation
TRIMBG20[9:0]
+35% to +40%
1001000000
+20% to +35%
0101000000
+5% to +25%
0011000000
-5% to +5%
0000000000
-15% to -5%
0001100000
-22.5% to -15%
0001010000
-27.5% to -22.5%
0001001000
-32.5% to -27.5%
0001000100
-35% to -32.5%
0001000010
-37.5% to -35%
0001000001
-40% to -37.5%
0001000000
Description
Min
Typ
Max
Units
Capacitor (C
L
)
1.8
2.2
2.6
μF
Digital
Core
V
BAT2A
V
SAUVS
V
SAUV
TRIMBG20[9:0]
RST
Internal
Voltage Reference
Battery
Pack
V
SAUVC
V
BG20
GND2
C
L
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