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AS1370
High Voltage, Low Quiescent Current,
200mA LDO
General Description
The AS1370 low-power, positive voltage regulator is designed
to deliver up to 200mA, while consuming only 3μA of quiescent
current. The device is available in fixed output voltages
between 1.2V and 5.5V (programmable in 100mV steps).
Standard options of 1.2, 1.8, 2.5, 3.0, 3.3, 4.5, 5.0 and 5.5V are
also available. The input voltage ranges from 2.6V to a
maximum of 50V. Operation with large input to output
differential voltages is limited by the maximum power
dissipation available from package and environment.
The very-low dropout voltage (550mV @ 200mA load) prolongs
battery life and allows high current in small applications with
minimum input-to-output voltage differentials. The device
features very stable output voltage (using only 1μF ceramic
capacitor), and excellent line- and load-regulation. The AS1370
also features a Power-OK Output. The device features
integrated short-circuit and over current protection. Thermal
Protection shuts down the device when die temperature
reaches 170°C. This is a useful protection when the device is
under sustained short circuit conditions.
The AS1370 is available in an 8-Pin MLPD 3mm x 3mm package
and is qualified for -40°C to 125°C operation.
Ordering Information and Content Guide appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS1370, High Voltage, Low
Quiescent Current, 200mA LDO are listed below:
Figure 1:
Added Value of Using AS1370
Benefits
Features
• Ideal for industrial or automotive applications
• Input voltage from 2.6V to 50V
• Operating temperature from -40°C to 125°C
• Ideal for a battery-driven always-on regulator
• Very low quiescent current of 3μA
• Supports a variety of end applications
• Guaranteed output current of 200mA
• Output voltage from 1.2V to 5.5V
• Power-OK indication
ams Datasheet
[v2-00] 2016-Jun-01
Page 1
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AS1370 − General Description
Benefits
Features
• Over-temperature and over-current protection
and shutdown
• Integrated temperature and output power
monitoring
• Cost-effective, small PCB area needed
• Less external components needed
• Small 8-pin MLPD 3mm x 3mm package
Applications
The wide input voltage range, low quiescent current and
high-accuracy output voltage make the devices perfectly suited
for a wide variety of industrial sensors, automotive and
battery-powered applications, where the regulators have to be
always on. The devices are also ideal for many other industrial
applications.
Figure 2:
AS1370 Typical Application Diagram
Input
2.6V to 50V
IN
CIN
1uF
OFF
ON
OUT
COUT
1uF
AS1370
SHDN
Output
1.2V to 5.5V
POK
GND
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − General Description
Block Diagram
The functional blocks of this device are shown below:
Figure 3:
AS1370 Block Diagram
AS1370
IN
SHDN
Enable
Block
Thermal
Overload
Protection
Bandgap Voltage
&
Current Reference
Shutdown/
Power-On
Control Logic
Error
Amplifier
OUT
Trimmable
Reference
Voltage & Noise
Bypass
POK
Power-OK
Compare
Logic
GND
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Pin Assignment
Pin Assignment
Figure 4:
Pin Diagram of AS1370 (Top View)
IN 1
SHDN 2
8 NC
AS1370
7 OUT
MLPD 8-pin 3x3mm
NC 3
Exposed pad: GND
GND 4
9
6 NC
5 POK
Figure 5:
Pin Description
Pin Name
Pin Number
IN
1
Unregulated Input Voltage. This pin should be connected to the
positive terminal of the input capacitor. Bypass with 1μF capacitor to
GND. Input voltage can range from 2.6V to 50V.
SHDN
2
Active-High Shutdown Input. A logic high reduces the ground pin
current to < 1μA. Connect this pin to GND for normal operation.
NC
3
Not Connected. This pins must be not connected.
GND
4
Ground.
POK
5
Power-OK Output. Active-low, open-drain output indicates an
out-of-regulation condition. Connect a 100kΩ pull-up resistor to pin OUT
for logic levels. Leave this pin unconnected if the Power-OK feature is not
used.
NC
6
Not Connected. This pins is not connected.
OUT
7
Regulated Output Voltage. This pin should be connected to the positive
side of the load and to the positive terminal of the output capacitor.
Current flowing out of this pin is equivalent to a DC load current. Fixed
1.2, 1.8, 2.5, 3.0, 3.3, 4.5, 5.0 and 5.5V output, as well as versions from 1.2V
up to 5.5V can be ordered. Bypass with 1μF capacitor to GND.
NC
8
Not Connected. This pin is not connected.
Exposed Pad
9
Exposed Pad. This pin functions as a heat sink. Solder it to a large pad or
to the circuit-board ground plane to maximize power dissipation.
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Description
ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed in Absolute Maximum Ratings may
cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other
conditions beyond those indicated in Electrical Characteristics
is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Figure 6:
Absolute Maximum Ratings
Parameter
Min
Max
Units
Notes
Electrical Parameters
IN
-0.9
+55
V
SHDN
-0.3
V IN + 0.3
V
OUT
-0.3
V IN + 0.3
V
POK
-0.3
V OUT + 0.3
V
Latch-Up Immunity
-100
+100
mA
Electrostatic Discharge
Electrostatic Discharge HBM
±1.5
kV
MIL 883 E method 3015
Temperature Ranges and Storage Conditions
Thermal Resistance θJA
36
°C/W
Operating Temperature
Range
-40
125
°C
Storage Temperature Range
-65
150
°C
Package Body Temperature
Relative Humidity
(non-condensing)
Moisture Sensitivity Level
ams Datasheet
[v2-00] 2016-Jun-01
260
5
°C
85
1
Junction-to-ambient thermal resistance
is very dependent on application and
board-layout. In situations where high
maximum power dissipation exists,
special attention must be paid to
thermal dissipation during board
design.
The reflow peak soldering temperature
(body temperature) specified is in
accordance with IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity
Classification for Non-Hermetic Solid
State Surface Mount Devices”.
The lead finish for Pb-free leaded
packages is matte tin (100% Sn).
%
Represents a max. floor life time of
“Unlimited”
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AS1370 − Electrical Characteristics
Electrical Characteristics
All limits are guaranteed. The parameters with Min and Max
values are guaranteed with production tests or SQC (Statistical
Quality Control) methods.
V IN = V OUT(NOMINAL) + 1V, or V IN = 2.6V (whichever is greater),
SHDN = GND, C IN = COUT = 1μF, IOUT = 100μA;
TAMB = -40°C to 125°C (unless otherwise specified);
typical values are at TAMB = 25ºC.
Figure 7:
Electrical Characteristics
Symbol
VIN
VOUT
Acc
ILIM
Parameter
Conditions
Min
Units
2.6
50
V
Output voltage
1.2
5.5
V
TAMB = 25°C
-1
+1
TAMB = -40°C to 125°C,
I OUT = 100μA to 200mA
-4
+4
DC output voltage
accuracy
Short circuit current
%
230
Ground pin current
370
3
I OUT = 200mA
Dropout voltage(1)
mA
8
3.7
TAMB = 85°C, I OUT = 0mA
VDROP
Max
Input voltage
I OUT = 0mA
IQ
Typ
μA
6.7
I OUT = 100mA
280
I OUT = 200mA
550
TAMB = 85°C, I OUT = 100mA
600
mV
500
∆VLNR
Line regulation(2)
V IN = V OUT(NOMINAL) + 1V to 50V
∆VLDR
Load regulation
I OUT = 1mA to 200mA
0.01
%/mA
PSRR
Power Supply Rejection
Ratio
f = 1kHz, I OUT = 10mA
50
dB
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-0.05
+0.05
%/V
ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Electrical Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Units
1.25
5
ms
0.6
1.2
μA
Shutdown(3)
tON
Exit delay from
shutdown(4)
IOFF
Shutdown current
VIH
VIL
ISHDN
Shutdown digital input
threshold
Shutdown input bias
current
SHDN = V IN
SHDN decreasing
1.6
V
SHDN increasing
0.4
SHDN = V IN
0.1
30
95
97
nA
Power-OK Output
VPOK
IPOK
Power-OK voltage
threshold
Power-OK leakage
current
V OUT falling
Hysteresis
93
% VOUT
1
0 ≤ VPOK ≤ V OUT,
V OUT in regulation
50
nA
Thermal Protection
TSHDN
Thermal shutdown
temperature
170
ºC
∆TSHDN
Thermal shutdown
hysteresis
15
ºC
Note(s):
1. Dropout voltage = VIN - VOUT when VOUT is 100mV < VOUT for VIN = VOUT(NOMINAL) +1V (applies only to output voltages ≥ 2.6V).
2. VOUT(NOMINAL) ≥ 1.6V.
3. The rise and fall time of the shutdown signal must not exceed 100ns.
4. The delay time is defined as time required to set VOUT to 95% of its final nominal value.
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Typical Operating Characteristics
Typical Operating
Characteristics
V OUT(NOMINAL) = 3.3V, V IN = 4.3V, IOUT = 100μA, C IN=COUT = 1μF;
typical values are at TAMB = 25°C (unless otherwise specified).
Figure 8:
Output Voltage vs. Temperature
Figure 9:
Line Regulation
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[v2-00] 2016-Jun-01
AS1370 − Typical Operating Characteristics
Figure 10:
Load Regulation
Figure 11:
Ground Pin Current vs. Temperature
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Typical Operating Characteristics
Figure 12:
Ground Pin Current vs. Input Voltage
Figure 13:
Ground Pin Current vs. Output Current
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[v2-00] 2016-Jun-01
AS1370 − Typical Operating Characteristics
2V/Div
SHDN
VOUT
1V/Div
Figure 14:
Exit Delay from Shutdown
200µs/Div
Figure 15:
Power Supply Ripple Rejection vs. Frequency, IOUT = 10mA
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Detailed Description
Detailed Description
The AS1370 is a low-dropout, low-quiescent-current linear
regulators intended for LDO regulator applications where
output current load requirements range from no load to 200mA.
The AS1370 also features a Power-OK output to indicate when
the output is within 5% of final value, and also a Shutdown pin.
Shutdown current for the whole regulator is typically 600nA.
The device features integrated short-circuit and over current
protection. Undervoltage lockout prevents erratic operation
when the input voltage is slowly decaying (e.g. in a battery
powered application). Thermal protection shuts down the
device when die temperature reaches 170°C. This is a useful
protection when the device is under sustained short circuit
conditions.
Figure 3 shows the block diagram of the AS1370. It identifies
the basics of a series linear regulator employing a P-Channel
MOSFET as the control element. A stable 1.2V voltage reference
(REF in Figure 3) is compared with an attenuated sample of the
output voltage. Any difference between the two voltages
(reference and sample) creates an output from the error
amplifier that drives the series control element to reduce the
difference to a minimum. The error amplifier incorporates
additional buffering to drive the relatively large gate
capacitance of the series pass P-channel MOSFET, when
additional drive current is required under transient conditions.
Input supply variations are absorbed by the series element, and
output voltage variations with loading are absorbed by the low
output impedance of the regulator.
Output Voltages
Standard products are factory-set with output voltages from
1.2V. A two-digit suffix of the part number identifies the
nominal out (see Ordering Information). Non-standard devices
are available. For more information contact
www.ams.com/contact.
Power-OK Functionality
The AS1370’s Power-OK is built around a N-channel MOSFET.
The Power-OK feature is not active during shutdown and
provides a power-on-reset function that can operate down to
V IN = 1.2V. A capacitor to GND may be added to generate a
power-on-reset delay. To obtain a logic-level output, connect a
pull-up resistor from pin POK to pin OUT. Larger values for this
resistor will help to minimize current consumption; a 100kΩ
resistor is perfect for most applications (see Figure 2).
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Detailed Description
Current Limiting
The AS1370 include current limiting circuitry to protect against
short-circuit conditions. The circuitry monitors and controls the
gate voltage of the P-channel MOSFET, limiting the output
current to 370mA. The P-channel MOSFET output can be
shorted to ground for an indefinite period of time without
damaging the device.
Thermal-Overload Protection
The devices are protected against thermal runaway conditions
by the integrated thermal sensor circuitry. Thermal shutdown
is an effective tool to prevent die overheating since the power
transistor is the principle heat source in the device.
If the junction temperature exceeds 170°C, the thermal sensor
starts the shutdown logic, at which point the P-channel MOSFET
is switched off. After the device temperature has dropped by
approximately 15°C, the thermal sensor will turn the P-channel
MOSFET on again. Note that this will be exhibited as a pulsed
output under continuous thermal-overload conditions.
Note(s): The absolute maximum junction-temperature of
170°C should not be exceeding during continual operation.
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Application Information
Application Information
Dropout Voltage
Dropout is the input to output voltage difference, below which
the linear regulator ceases to regulate. At this point, the output
voltage change follows the input voltage change. Dropout
voltage may be measured at different currents and in particular
at the regulator maximum one. From this the MOSFET maximum
series resistance over temperature is obtained. More generally:
(EQ1)
V
DROPOUT
= I
LOAD
×R
SERIES
Dropout is a key specification when the regulator is used in a
battery application. The dropout performance of the regulator
defines the useful “end of life” of the battery before
replacement or re-charge is required.
Figure 16:
Graphical Representation of Dropout Voltage
VOUT
VIN
VIN ≥ VOUT + 0.5V
Dropout
Voltage
VOUT
100mV
VIN
VOUT
VIN
Figure 16 shows the variation of VOUT as V IN is varied for a
certain load current. The practical value of dropout is the
differential voltage (VOUT - VIN ) measured at the point where
the LDO output voltage has fallen by 100mV below the nominal,
fully regulated output value. The nominal regulated output
voltage of the LDO is that obtained when there is 500mV (or
greater) input-output voltage differential.
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Application Information
Efficiency
Low quiescent current and low input-output voltage
differential are important in battery applications amongst
others, as the regulator efficiency is directly related to
quiescent current and dropout voltage. Efficiency is given by:
(EQ2)
V
×I
V IN × ( I Q + I LOAD )
OUT
LOAD
- × 100 %
Efficiency = ------------------------------------------------
Where:
I Q= Quiescent current of LDO measured.
Power Dissipation
The power dissipated by the internal series MOSFET PD (MAX)
(Seriespass) is calculated as:
(EQ3)
PD (MAX) (Seriespass) =( V IN ( MAX ) – VOUT ( MIN ) ) × I LOAD ( MAX ) [W]
Internal power dissipation PD (MAX) (Bias), result of the quiescent
current required to bias the internal voltage reference and the
error amplifier, is calculated as:
(EQ4)
PD (MAX) (Bias) = V IN ( MAX ) × I Q [W]
The maximum power dissipation PD (MAX) (Total) of the LDO is
calculated as:
(EQ5)
ams Datasheet
[v2-00] 2016-Jun-01
PD (MAX) (Total) = PD (MAX) (Seriespass) + PD (MAX) (Bias) [W]
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AS1370 − Application Information
Junction Temperature
Under operating conditions, the maximum junction
temperature should not exceed 125°C. Regulating the
maximum junction temperature requires knowledge of the
heat path from junction to case Θ JC [°C/W] fixed by the IC
manufacturer, and adjustment of the case to ambient heat path
Θ CA [°C/W] by manipulation of the PCB copper area adjacent to
the IC position.
Figure 17:
Steady State Heat Flow Equivalent Circuit
Junction
TJ
Package
TC
RθJ C
PCB
TS
RθCS
Ambient
TA
RθS A
RθJ A
Total Thermal Path Resistance (junction-to-ambient) is
determined by:
(EQ6)
θ JA = θ JC + θ CS + θ SA [ºC/W]
Junction Temperature is determined by:
(EQ7)
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TJ = PD(MAX) × θ JA + TAMB [ºC]
ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Application Information
Explanation of Steady State Specifications
Line Regulation
Line regulation is defined as the percentual 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. More
generally:
(EQ8)
ΔV
OUT
Line Regulation = --------------------and is a pure number
ΔV
IN
In practise, line regulation is referred to the regulator output
voltage in terms of % / V OUT. This is particularly useful when the
same regulator is available with numerous output voltage trim
options.
(EQ9)
ΔV
100
OUT
--------------------- × ----------------ΔV
V
IN
OUT
Line Regulation =
[% / V]
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:
(EQ10)
ΔV
OUT
Load Regulation = --------------------[Ω]
ΔI
OUT
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.
(EQ11)
ΔV
OUT
100
Load Regulation = --------------------× ----------------- [% / mA]
ΔI
OUT
V
OUT
Setting Accuracy
Accuracy of the final output voltage is determined by 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.
The reference tolerance is given both at 25°C and over the full
operating temperature range.
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Application Information
Total Accuracy
Away from dropout, total steady state accuracy is the sum of
setting accuracy, load regulation and line regulation. Generally:
(EQ12)
Total Accuracy % = Setting Accuracy % + Load Regulation % + Line
Regulation %
Explanation of Dynamic Specifications
Power Supply Rejection Ratio (PSRR)
Known also as Ripple Rejection, this specification measures the
ability of the regulator to reject noise and ripple beyond DC.
PSRR depends on a summation of the individual rejections of
the error amplifier, reference and AC leakage through the series
pass transistor. The specification, in the form of a typical
attenuation plot with respect to frequency, shows up the gain
bandwidth compromises forced upon the designer in low load
current conditions. Generally:
(EQ13)
PSSR =
δV
OUT
20Log --------------------δV
IN
[dB] using lower case δ to indicate AC
values
Power supply rejection ratio is fixed by the internal design of
the regulator. Additional filtering must be provided externally.
Output Capacitor ESR
The series regulator is a negative feedback amplifier, and as
such is conditionally stable. The ESR of the output capacitor is
usually used to cancel one of the open loop poles of the error
amplifier in order to produce a single pole response; maximum
ESR should be less than 500mΩ. Excessive ESR values may
actually cause instability by excessive changes to the closed
loop unity gain frequency crossover point. The range of ESR
values for stability is usually shown either by a plot of stable
ESR versus load current, or a limit statement in the datasheet.
Some ceramic capacitors exhibit large capacitance and ESR
variations in temperature. Z5U and Y5V capacitors may be
required to ensure stability at temperatures below TAMB = -10°C.
With X7R or X5R capacitors, a 1.0μF capacitor should be
sufficient at all operating temperatures.
Larger output capacitor values (>10μF) help to further reduce
noise and improve load transient-response, stability and
power-supply rejection.
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Application Information
Input Capacitor
An input capacitor at V IN is required for stability. It is
recommended that a 1.0μF capacitor be connected between
the AS1370 power supply input pin V IN and ground
(capacitance value may be increased without limit subject to
ESR limits). This capacitor must be located at a distance of not
more than 1cm from the V IN pin and returned to a clean analog
ground. Any good quality ceramic, tantalum, or film capacitor
may be used at the input.
Noise
The regulator output is a DC voltage with superimposed noise
on the output. The noise comes from three sources: the
reference, the error amplifier input stage and the output
voltage setting resistors. Noise is a random fluctuation: if noise
is not minimized in some applications, it will produce system
problems.
Load Transient Response
The series regulator is a negative feedback system: therefore
any change at the output will take a finite time to be corrected
by the error loop. This “propagation time” is related to the
bandwidth of the error loop. The initial response to an output
transient comes from the output capacitance; during this time,
ESR is the dominant mechanism causing voltage transients at
the output. More generally:
(EQ14)
δV TRANSIENT = δI OUT × ESR
[V]
Thus an initial +50mA change of output current will produce a
-12mV transient when the ESR=240mΩ. Remember to keep the
ESR within stability recommendations when reducing ESR by
adding multiple parallel output capacitors.
After the initial ESR transient, there follows a voltage drop
during the time that the LDO feedback loop takes to respond
to the output change. This drift is approximately linear in time
and sums with the ESR contribution to make a total transient
variation at the output of:
(EQ15)
T
δV TRANSIENT = δI OUT ×  ESR + ------------------
C LOAD
[V]
Where:
C LOAD = load capacitor [F];
T= propagation delay of the LDO [s].
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Application Information
This shows why it is convenient to increase the output capacitor
value for a better support for fast load changes. Of course the
formula holds for t < “propagation time”, so that a faster LDO
needs a smaller cap at the load to achieve a similar transient
response. For instance, 50mA load current step produces 50mV
output drop if the LDO response is 1μs and the load cap is 1μF.
There is also a steady state error caused by the finite output
impedance of the regulator. This is derived from the load
regulation specification discussed above.
Turn On Time
This specification defines the time taken for the LDO to awake
from shutdown. The time is measured from the release of the
shutdown pin to the time that the output voltage is within 5%
of the final value. It assumes that the voltage at V IN is stable and
within the regulator min and max limits. Shutdown reduces the
quiescent current to very low, mostly leakage values (<1μA
typ.).
Thermal Protection
To prevent operation under extreme fault conditions, such as a
permanent short circuit at the output, thermal protection is
built into the device. Die temperature is measured, and when a
170°C threshold is reached, the device enters shutdown. When
the die cools sufficiently, the device will restart (assuming input
voltage exists and the device is enabled). Hysteresis of 15°C
prevents low frequency oscillation between start-up and
shutdown around the temperature threshold.
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Package Drawings & Markings
Package Drawings & Markings
The device is available in a 8-Pin MLPD 3mm x 3mm package.
Figure 18:
Drawings and Dimensions
RoHS
Green
Symbol
Min
Nom
Max
A
A1
A3
L
b
D
E
D2
E2
e
aaa
bbb
ccc
ddd
eee
N
0.70
0
0.75
0.02
0.20 REF
0.40
0.30
3.00 BSC
3.00 BSC
2.38
1.64
0.65 BSC
0.15
0.10
0.10
0.05
0.08
8
0.80
0.05
0.30
0.23
2.23
1.49
-
0.50
0.38
2.48
1.74
-
Note(s):
1. Dimensions and tolerancing conform to ASME Y14.5M-1994.
2. All dimensions are in millimeters. Angles are in degrees.
3. Coplanarity applies to the exposed heat slug as well as the terminal.
4. Radius on terminal is optional.
5. N is the total number of terminals.
ams Datasheet
[v2-00] 2016-Jun-01
Page 21
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AS1370 − Package Drawings & Mark ings
Figure 19:
8-Pin MLPD 3mm x 3mm Marking
YYYY
XXXX
@
Figure 20:
Packaging Code
Page 22
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YYYY
XXXX
@
Marking Code
Tracecode
Sublot Identifier
ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Ordering & Contact Information
Ordering & Contact Information
The device is available as the standard products listed in
Figure 21.
Figure 21:
Ordering Information
Ordering Code
Output
Voltage
Package
Marking
Code
Delivery
Form
Delivery
Quantity
AS1370-ATDT-27
2.7V
8-Pin MLPD
3mm x 3mm
ASV1
Tape & Reel
1000 pcs/reel
AS1370-ATDT-28
2.8V
8-Pin MLPD
3mm x 3mm
ASV2
Tape & Reel
1000 pcs/reel
AS1370-ATDT-33
3.3V
8-Pin MLPD
3mm x 3mm
ASQA
Tape & Reel
1000 pcs/reel
AS1370-ATDTSAMPLE(1)
XX(1)
8-Pin MLPD
3mm x 3mm
ASQK
Tape & Reel
1000 pcs/reel
Note(s):
1. Non-standard devices are available between 1.2V and 5.5V in 100mV steps.
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Headquarters
ams AG
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Tel: +43 (0) 3136 500 0
Website: www.ams.com
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − RoHS Compliant & ams Green Statement
RoHS Compliant & ams Green
Statement
RoHS: The term RoHS compliant means that ams AG products
fully comply with current RoHS directives. Our semiconductor
products do not contain any chemicals for all 6 substance
categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to
be soldered at high temperatures, RoHS compliant products are
suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br): ams Green
defines that in addition to RoHS compliance, our products are
free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous
material).
Important Information: The information provided in this
statement represents ams AG knowledge and belief as of the
date that it is provided. ams AG bases its knowledge and belief
on information provided by third parties, and makes no
representation or warranty as to the accuracy of such
information. Efforts are underway to better integrate
information from third parties. ams AG has taken and continues
to take reasonable steps to provide representative and accurate
information but may not have conducted destructive testing or
chemical analysis on incoming materials and chemicals. ams AG
and ams AG suppliers consider certain information to be
proprietary, and thus CAS numbers and other limited
information may not be available for release.
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ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Copyrights & Disclaimer
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten,
Austria-Europe. Trademarks Registered. All rights reserved. The
material herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of
the copyright owner.
Devices sold by ams AG are covered by the warranty and patent
indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied,
or by description regarding the information set forth herein.
ams AG reserves the right to change specifications and prices
at any time and without notice. Therefore, prior to designing
this product into a system, it is necessary to check with ams AG
for current information. This product is intended for use in
commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or
high reliability applications, such as military, medical
life-support or life-sustaining equipment are specifically not
recommended without additional processing by ams AG for
each application. This product is provided by ams AG “AS IS”
and any express or implied warranties, including, but not
limited to the implied warranties of merchantability and fitness
for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any
damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation
or liability to recipient or any third party shall arise or flow out
of ams AG rendering of technical or other services.
ams Datasheet
[v2-00] 2016-Jun-01
Page 25
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AS1370 − Document Status
Document Status
Document Status
Product Preview
Preliminary Datasheet
Datasheet
Datasheet (discontinued)
Page 26
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Product Status
Definition
Pre-Development
Information in this datasheet is based on product ideas in
the planning phase of development. All specifications are
design goals without any warranty and are subject to
change without notice
Pre-Production
Information in this datasheet is based on products in the
design, validation or qualification phase of development.
The performance and parameters shown in this document
are preliminary without any warranty and are subject to
change without notice
Production
Information in this datasheet is based on products in
ramp-up to full production or full production which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade
Discontinued
Information in this datasheet is based on products which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and
should not be used for new designs
ams Datasheet
[v2-00] 2016-Jun-01
AS1370 − Revision Information
Revision Information
Changes from1.11 (2014-Jan-04) to current revision 2-00 (2016-Jun-01)
Page
Content was updated to the latest ams design
Added benefits to Key Features
1
Updated Package Drawings & Markings section
21
Note(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
ams Datasheet
[v2-00] 2016-Jun-01
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AS1370 − Content Guide
Content Guide
Page 28
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1
1
2
3
General Description
Key Benefits & Features
Applications
Block Diagram
4
5
6
8
Pin Assignment
Absolute Maximum Ratings
Electrical Characteristics
Typical Operating Characteristics
12
12
12
13
13
Detailed Description
Output Voltages
Power-OK Functionality
Current Limiting
Thermal-Overload Protection
14
14
15
15
16
17
17
17
17
18
18
18
18
19
19
19
20
20
Application Information
Dropout Voltage
Efficiency
Power Dissipation
Junction Temperature
Explanation of Steady State Specifications
Line Regulation
Load Regulation
Setting Accuracy
Total Accuracy
Explanation of Dynamic Specifications
Power Supply Rejection Ratio (PSRR)
Output Capacitor ESR
Input Capacitor
Noise
Load Transient Response
Turn On Time
Thermal Protection
21
23
24
25
26
27
Package Drawings & Markings
Ordering & Contact Information
RoHS Compliant & ams Green Statement
Copyrights & Disclaimer
Document Status
Revision Information
ams Datasheet
[v2-00] 2016-Jun-01