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LD49300 数据表(PDF) 8 Page - STMicroelectronics

部件名 LD49300
功能描述  3A Very low drop for low output voltage regulator
PDF  20 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LD49300 数据表(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
LD49300
8/20
6
Electrical characteristics
Table 4.
Electrical characteristics
(TJ = -25°C to 125 °C, VBIAS = VO+2.1V
(1); V
I = VO+1V; VEN = VBIAS
(2), I
O = 10mA; CI = 1µF;
CO = 10µF; CBIAS = 1µF; unless otherwise specified. Typical values are referred to TJ = 25°C).
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage accuracy
TJ = 25°C, fixed voltage options
-1.5
1.5
%
Over temperature range
-3
3
VLINE
Line regulation
VI = VO+1V to 5.5V
-0.1
0.1
%/V
VLOAD
Load regulation
IL = 0mA to 3A, VBIAS ≥ 3V
1%
VDROP
Dropout voltage (VI - VO)
IL = 1.5A
200
mV
IL = 3A
400
VDROP
Dropout voltage (VBIAS- VO)
IL = 3A
(1)
1.
For VO ≤1V, VBIAS dropout specification does not apply due to a minimum 3V VBIAS input.
1.5
2.1
V
IGND
Ground pin current
IL = 0mA
46
mA
IL = 3A
46
IGND_SHD Ground pin current in shutdown
VEN ≤0.4V
(2)
2.
Fixed output voltage version only.
5µA
IVBIAS
Current through VBIAS
IL = 0mA
35
mA
IL = 3A
35
IL
Current limit
VO = 0V
4.5
A
Enable Input (2)
VEN
Enable input threshold (fixed
voltage only)
Regulator Enable
1.4
V
Regulator Shutdown
0.4
IEN
Enable pin input current
0.1
1
µA
Reference
VREF
Reference voltage
TJ = 25°C
0.788
0.8
0.812
V
Over temperature range
0.776
0.8
0.824
SVR
Supply voltage rejection
VI = 2.5V±0.5V, VO = 1V,
F = 120Hz, VBIAS = 3.3V
68
dB



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