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EMP8965-12VC06GRR Schematic ( PDF Datasheet ) - Elite Semiconductor

Teilenummer EMP8965-12VC06GRR
Beschreibung 600mA Micropower CMOS Linear Regulator
Hersteller Elite Semiconductor
Logo Elite Semiconductor Logo 




Gesamt 20 Seiten
EMP8965-12VC06GRR Datasheet, Funktion
ESMT/EMP
EMP8965
Fast Ultra High-PSRR, Low-Noise, Low-Dropout,
600mA Micropower CMOS Linear Regulator
General Description
The EMP8965 low-dropout (LDO) CMOS linear regulators
feature ultra-high power supply rejection ratio (75dB at
1kHz), low output voltage noise (30µV), low dropout
voltage (270mV), low quiescent current (110µA), and fast
transient response. It guarantees delivery of 600mA output
current, and supports preset output voltages ranging from
1.2V to 3.3V with 0.1V increment (except for 1.85V and
2.85V).
The EMP8965 is ideal for battery-powered applications by
virtue of its low quiescent current consumption and its 1nA
shutdown mode of logical operation. The regulator
provides fast turn-on and start-up time by using dedicated
circuitry to pre-charge an optional external bypass
capacitor. This bypass capacitor is used to reduce the
output voltage noise without adversely affecting the load
transient response. The high power supply rejection ratio of
the EMP8965 holds well for low input voltages typically
encountered in battery- operated systems. The regulator is
stable with small ceramic capacitive loads (2.2µF typical).
Additional features include regulation fault detection,
bandgap voltage reference, constant current limiting and
thermal overload protection. Available in miniature 5-pin
SOT-89-5 package options, SOT-23-5 and SOT-23-6
package options are also offered to provide additional
flexibility for different applications.
EMP products is RoHS compliant.
Features
„ Miniature SOT-23-5, SOT-23-6and SOT-89-5 packages
„ 600mA guaranteed output current
„ 75dB typical PSRR at 1kHz
„ 30µV RMS output voltage noise (10Hz to 100kHz)
„ 270mV typical dropout at 600mA
„ 110µA typical quiescent current
„ 1nA typical shutdown mode
„ Fast line and load transient response
„ 80µs typical fast turn-on time
„ 2.5V to 5.5V input range
„ Stable with small ceramic output capacitors
„ Over temperature and over current protection
„ ±2% output voltage tolerance
Applications
„ Wireless handsets
„ PCMCIA cards
„ DSP core power
„ Hand-held instruments
„ Battery-powered systems
„ Portable information appliances
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc.
Publication Date : May 2009
Revision : 2.1 1/20






EMP8965-12VC06GRR Datasheet, Funktion
ESMT/EMP
Absolute Maximum Ratings (Notes 1, 2)
EMP8965
VIN, VOUT, V SHDN , VSET, VCC, V FAULT
Power Dissipation
Storage Temperature Range
Junction Temperature (TJ)
Lead Temperature (10 sec.)
ESD Rating
Human Body Model (Note 5)
MM
-0.3V to 6.0V
(Note 3)
-65°C to160°C
150°C
260°C
2kV
200V
Thermal Resistance (θJA) (Note 3)
SOT-23-5
SOT-23-6
SOT-89-5
250°C/W
250°C/W
100°C/W
Operating Ratings (Note 1), (Note 2)
Temperature Range
-40°C to 85°C
Supply Voltage
2.5V to 5.5V
Electrical Characteristics
Unless otherwise specified, all limits guaranteed for VIN = VOUT +1V (Note 6), V SHDN = VIN, CIN = COUT = 2.2µF, CCC = 33nF,
TJ = 25°C. Boldface limits apply for the operating temperature extremes: -40°C and 85°C.
Symbol
Parameter
Conditions
Typ
Min
Max
Units
(Note 7)
VIN Input Voltage
2.5 5.5 V
ΔVOTL
100µA IOUT 300mA
Output Voltage Tolerance VOUT (NOM) +0.5V VIN 5.5V
(Note 6)
-2
-3
+2
% of
VOUT (NOM)
+3
IOUT
ILIMIT
IQ
VDO
ΔVOUT
en
V SHDN
I SHDN
Maximum Output Current Average DC Current Rating
Output Current Limit
(SOT-23-5, SOT-23-6)
Output Current Limit
(SOT-89-5)
Supply Current
Shutdown Supply Current
IOUT = 0mA
IOUT = 600mA
VOUT = 0V, SHDN = GND
Dropout Voltage
(Note 4), (Note 6)
IOUT = 50mA
IOUT = 300mA
IOUT = 600mA
IOUT = 1mA, (VOUT + 0.5V) VIN
Line Regulation
5.5V
(Note 7)
Load Regulation
100µA IOUT 600mA
Output Voltage Noise
IOUT = 10mA, 10Hz f 100kHz
VIH, (VOUT + 0.5V) VIN 5.5V
SHDN Input Threshold
(Note 6)
VIL, (VOUT + 0.5V) VIN 5.5V
(Note 6)
SHDN Input Bias Current SHDN = GND or VIN
600
600
630
-0.1
1.2
950
950
110
255
0.001
22
130
270
0.02
0.001
30
0.1
mA
mA
mA
µA
1
mV
0.1 %/V
%/mA
µVRMS
V
0.4
100 nA
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc.
Publication Date : May 2009
Revision : 2.1 6/20

6 Page









EMP8965-12VC06GRR pdf, datenblatt
ESMT/EMP
EMP8965
Application Information
General Description
Referring to Figure 3 as shown in the Functional Block
Diagram section, the EMP8965 adopts the classical
regulator topology in which negative feedback control
is used to perform the desired voltage regulating
function. The negative feedback is formed by using
feedback resistors (R1, R2) to sample the output voltage
for the non-inverting input of the error amplifier, whose
inverting input is set to the bandgap reference voltage.
By virtue of its high open-loop gain, the error amplifier
operates to ensure that the sampled output feedback
voltage at its non-inverting input is virtually equal to the
preset bandgap reference voltage.
The error amplifier compares the voltage difference at
its inputs and produces an appropriate driving voltage
to the P-channel MOS pass transistor to control the
amount of current reaching the output. If there are
changes in the output voltage due to load changes,
the feedback resistors register such changes to the
non-inverting input of the error amplifier. The error
amplifier then adjusts its driving voltage to maintain
virtual short between its two input nodes under all
loading conditions. In a nutshell, the regulation of the
output voltage is achieved as a direct result of the error
amplifier keeping its input voltages equal. This negative
feedback control topology is further augmented by the
shutdown, the fault detection, and the temperature
and current protection circuitry.
Output Capacitor
The EMP8965 is specially designed for use with ceramic
output capacitors of as low as 2.2µF to take advantage
of the savings in cost and space as well as the superior
filtering of high frequency noise. Capacitors of higher
value or other types may be used, but it is important to
make sure its equivalent series resistance (ESR) be
restricted to less than 0.5Ω. The use of larger capacitors
with smaller ESR values is desirable for applications
involving large and fast input or output transients, as
well as for situations where the application systems are
not physically located immediately adjacent to the
battery power source. Typical ceramic capacitors
suitable for use with the EMP8965 are X5R and X7R. The
X5R and the X7R capacitors are able to maintain their
capacitance values to within ±20% and ±10%,
respectively, as the temperature increases.
No-Load Stability
The EMP8965 is capable of stable operation during
no-load conditions, a mandatory feature for some
applications such as CMOS RAM keep-alive operations.
Input Capacitor
A minimum input capacitance of 1µF is required for
EMP8965. The capacitor value may be increased
without limit. Improper workbench set-ups may have
adverse effects on the normal operation of the
regulator. A case in point is the instability that may result
from long supply lead inductance coupling to the
output through the gate capacitance of the pass
transistor. This will establish a pseudo LCR network, and is
likely to happen under high current conditions or near
dropout. A 10µF tantalum input capacitor will dampen
the parasitic LCR action thanks to its high ESR. However,
cautions should be exercised to avoid regulator
short-circuit damage when tantalum capacitors are
used, for they are prone to fail in short-circuit operating
conditions.
Compensation (Noise Bypass) Capacitor
Substantial reduction in the output voltage noise of the
EMP8965 is accomplished through the connection of
the noise bypass capacitor CC (33nF optimum)
between pin 4(SOT-25, SOT-26), pin 1(SOT-89-5) and the
ground. Because pin 4(SOT-25, SOT-26), pin 1(SOT-89-5)
connects directly to the high impedance output of the
bandgap reference circuit, the level of the DC leakage
currents in the CC capacitors used will adversely
reduce the regulator output voltage. This sets the DC
leakage level as the key selection criterion of the CC
capacitor types for use with the EMP8965. NPO and
COG ceramic capacitors typically offer very low
leakage. Although the use of the CC capacitors does
not affect the transient response, it does affect the
turn-on time of the regulator. Tradeoff exists between
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc.
Publication Date : May 2009
Revision : 2.1 12/20

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