AS1364-BTDT-33-1k ams, AS1364-BTDT-33-1k Datasheet - Page 13

• Manufacturer Part Number: AS1364-BTDT-33-1k
• Description: Low Dropout Controllers - LDO
• Manufacturer: ams

Specifications of AS1364-BTDT-33-1k

• Rohs: yes
• Input Voltage Max: 5.5 V
• Output Voltage: 3.3 V
• Output Current: 1 A
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TDFN-8
• Input Voltage Min: 2 V
• Minimum Operating Temperature: - 40 C

AS1364
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Total Thermal Path Resistance:
Junction Temperature (T
9.5 Explanation of Steady State Specifications
9.5.1 Line Regulation
Line regulation is defined as the change in output voltage when the input (or line) voltage is changed by a known quantity. It is a measure of the
regulator’s ability to maintain a constant output voltage when the input voltage changes. Line regulation is a measure of the DC open loop gain
of the error amplifier. More generally:
Line Regulation =
In practise, line regulation is referred to the regulator output voltage in terms of % / V
available with numerous output voltage trim options.
9.5.2 Load Regulation
Load regulation is defined as the change of the output voltage when the load current is changed by a known quantity. It is a measure of the
regulator’s ability to maintain a constant output voltage when the load changes. Load regulation is a measure of the DC closed loop output
resistance of the regulator. More generally:
In practise, load regulation is referred to the regulator output voltage in terms of % / mA. This is particularly useful when the same regulator is
available with numerous output voltage trim options.
9.5.3 Setting Accuracy
Accuracy of the final output voltage is determined by the accuracy of the ratio of R1 and R2, the reference accuracy and the input offset voltage
of the error amplifier. When the regulator is supplied pre-trimmed, the output voltage accuracy is fully defined in the output voltage specification.
When the regulator has a SET terminal, the output voltage may be adjusted externally. In this case, the tolerance of the external resistor network
must be incorporated into the final accuracy calculation. Generally:
The reference tolerance is given both at 25ºC and over the full operating temperature range.
9.5.4 Total Accuracy
Away from dropout, total steady state accuracy is the sum of setting accuracy, load regulation and line regulation. Generally:
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V
----------------
V
OUT
IN
J
ºC) is determined by:
Total % Accuracy = Setting % Accuracy + Load Regulation % + Line Regulation %
and is a pure number
Load Regulation =
Load Regulation =
V
Line Regulation =
OUT
T
J
R
=
=
JA


V
PD
SET
=

V
----------------
MAX
R
I

V
----------------
I
V
OUT
V
----------------
OUT
JC

V
OUT
OUT

SET
+
OUT
Revision 1.8
R
IN
and is units of ohms ()
R




JA

1
CS
----------------
V

+
------------
V
100
100
+
+
OUT
R1 R1
---------------------
R2 R2
OUT
R
T
AMB


SA
OUT
% / V
% / mA
ºC
. This is particularly useful when the same regulator is


(EQ 14)
(EQ 10)
(EQ 12)
(EQ 13)
(EQ 11)
13 - 19
(EQ 8)
(EQ 9)