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參數(shù)資料
| 型號(hào)： | SC1458BWLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Dual Output Low Noise LDO Linear Regulator |
| 中文描述： | 雙輸出低噪聲LDO線性穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 4/13頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | SC1458BWLTRT |
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SC1458
4
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Power Supply Rejection Ratio
(2)
PSRR
V
IN
= 3.7V, I
OUT
= 50mA, f = 1kHz,
C
BYP
= 22nF
65
dB
V
IN
= 3.7V, I
OUT
= 50mA, f = 1kHz
40
PGOOD Delay
(3)
t
PGOOD
160
200
240
ms
PGOOD Threshold
(3)
V
TH(PGOOD)
V
OUT(LDOA)
falling
82
87
92
%
Start-Up Time
t
SU
From OFF to 87% V
, I
OUT
= 50mA,
C
BYP
= 22nF
1
ms
Power Up Delay Between LDOA
and LDOB
t
DELAY
Delay between 0.87V
OUTA
and V
OUTB
start-up
128
μs
Under Voltage Lockout
V
UVLO
V
IN
Rising
2.15
2.25
2.35
V
UVLO Hysteresis
V
UVLO-HYS
100
mV
Over Temperature Protection
Threshold
T
OT
Rising threshold
160
°C
Over Temperature
Hysteresis
T
OT-HYS
20
°C
Digital Inputs
Logic Input High Threshold
V
IH
V
IN
= 5.5V
1.25
V
Logic Input Low Threshold
V
IL
V
IN
= 2.5V
0.4
V
Logic Input High Current
I
IH
V
IN
= 5.5V
1
μA
Logic Input Low Current
I
IL
V
IN
= 5.5V
1
μA
Digital Outputs
PGOOD Output Voltage Low
V
OL
I
SINK
= 500μA, V
IN
= 3.7V
7
20
mV
Electrical Characteristics (continued)
Notes:
(1) Dropout voltage is defined as V
IN
- V
OUT
, when V
OUT
is 100 mV below the value of V
OUT
for V
IN
= V
OUT
+0.5V.
(2) SC1458B only
(3) SC1458A only
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