LD3985XX122 STMicroelectronics, LD3985XX122 Datasheet - Page 8

• Manufacturer Part Number: LD3985XX122
• Description: ULTRA LOW DROP LOW NOISE BICMOS VOLTAGE REGULATOR LOW ESR CAPACITOR COMPATIBLE
• Manufacturer: STMicroelectronics

Specifications of LD3985XX122

• Wide Range Of Output Voltage: 1.22 V; 1.8 V; 2.5 V; 2.6 V; 2.7 V; 2.8 V; 2.9 V; 3 V; 3.3 V; 4.7 V
• Fast Turn-on Time: typ. 200µs
• Temperature Range: -40°C to 125 °C

Electrical characteristics
Table 5.
1. For V
2. For V
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This
4. Turn-on time is time measured between the enable input just exceeding V
5. Typical thermal protection hysteresis is 20 °C
6. The minimum capacitor value is 1 µF, anyway the LD3985 is still stable if the compensation capacitor has a 30 % tolerance
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Symbol
T
I
SVR
V
O(PK)
I
SHDN
t
eN
C
specification does not apply for input voltages below 2.5 V
reaching 95 % of its nominal value
in all temperature range
INH
ON
INH
O
O(NOM)
O(NOM)
Supply voltage rejection
Peak output current
Inhibit input logic low
Inhibit input logic high
Inhibit input current
Output noise voltage
Turn On time
Thermal shutdown
Output capacitor
Electrical characteristics for LD3985 (continued)
= 1.25 V, V
< 2 V, V
Parameter
I
= 2.5 V
(4)
I
= 2.5 V
V
V
V
V
V
V
B
C
(5)
Capacitance
ESR
I
RIPPLE
O(NOM)
O
I
INH
W
BYP
= V
= 2.5V to 6V, T
≥ V
= 10 Hz to 100 kHz, C
= 0.4V, V
= 10 nF
O(NOM)
O(NOM)
= 0.1V, I
< 2.5V, V
Doc ID 9587 Rev 14
Test conditions
+0.25V ±
(6)
- 5%
I
= 6V
O
J
I
= 50mA
= -40 to 125°C
= 2.55V
O
= 1µF
f = 1kHz
f = 10kHz
INH
High Value and the output voltage just
Min.
300
1.2
1
5
Typ.
550
100
160
±1
60
50
30
Max.
5000
250
0.4
22
LD3985xx
µV
Unit
mΩ
mA
dB
nA
°C
µF
µs
V
RMS