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ST3L01K7R
TRIPLE VOLTAGE REGULATOR
1/12March 2002 DUAL INPUT VOLTAGE (12V AND 5V) TRIPLE OUTPUT VOLTAGE (2.6V, 3.3V, 8V) 2.6V GUARANTEED I OUT UP TO 1.2A 3.3V GUARANTEED I OUT UP TO 1.0A 8V GUARANTEED IOUT UP TO 200mA THERMAL AND SHORT CIRCUIT
PROTECTION GUARANTEED OPERATING
TEMPERATURE RANGE (0°C to 125°C)
DESCRIPTIONThis device contains three voltage regulators, all
fixed output voltage, in one 7 pin surface mount
package. The first is a 2.6 V regulator to power the
integrated controller/μP. The second is a 3.3V
regulator to power the read channel chip, and
memory chips requiring 3.3V The last is an 8V
regulator to power the preamp chip. The bandgap
reference, the 8V ground, and the substrate are all
tied to a common ground pin, while the 2.6V and
3.3V ground is tied to a separate ground pin.This
grounding scheme allows for improved noise
isolation between the 8V regulator and the 2.6V
and 3.3V regulators.The 2.6V and 3.3V regulators
shall be respectively capable of 1.0A and 1.2A.
The 8V regulator shall be capable of 200mA.
It is housed in the SPAK (PowerFlex)
ST3L01TRIPLE VOLTAGE REGULATOR
SCHEMATIC DIAGRAM
ST3L012/12
ABSOLUTE MAXIMUM RATINGS
GENERAL OPERATING CONDITION
THERMAL DATA
CONNECTION DIAGRAM (top view) PIN DESCRIPTION
ORDERING INFORMATION (*) Available in Tape & Reel with the suffix "R"
ST3L013/12
TYPICAL APPLICATION CIRCUIT Note: To improve noise figure of the 8V VREG connect this capacitor to the GND8V pin. CCC, CDD, CO1, CO2 and CO3 capacitors must be
located not more than 0.5" from the output pins of the device. Form more details about Capacitors read the "Application Hints"
ELECTRICAL CHARACTERISTICS (VCC=5V, VDD=12V, CCC=1μF (Tantalum), CDD=0.1μF (X7R), O1=CO2=CO3 =0.11μF (X7R) Tj =0 to 125°C unless otherwise specified. Typical values are referred at
Tj=25°C, IFL1 =1.2A, IFL2 =1.0A, IFL3 =0.2A,
ST3L014/12
Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data
Note 2: Dropout Voltage is defined as the minimum differential voltage between VI and VO required to mantain regulation at VO. It is measured
when the output voltage drops 100mV below its nominal value.
Note 3: Transient response is defined with a step change in load from 10mA to IFL/2 as the time from the load step until the output voltage
reaches it’s minimum value.
Note 4: Minimum load current is defined as the minimum current required at the output in order to maintain regulation for the output voltage.
Note 5: The regulator shall withstand 100000 reverse bias discharges of the maximum output capacitance, with no degradation, when the
input voltage is switched to ground in 1 μs.
Note 6: Temperature stability is the change in output from nominal over the operating temperature range.
Note 7: Guaranteed by design, not tested in production.
APPLICATION HINTS
EXTERNAL CAPACITORSThe ST3L01 requires external capacitors for
stability. We suggest to solder both capacitors as
close as possible to the relative pins.
INPUT CAPACITORSAn input capacitor, whose value is at least 0.1μF,
is required on the VDD input; the amount of the
input capacitance can be increased without limit.
Any good quality tantalum or ceramic low ESR
capacitor may be used at the VDD input.
Any input capacitor, whose value is at least 1mF is
instead required on the VCC input; the amount of
this input capacitance can be increased without
limit. Tantalum or aluminum electrolitic capacitor
can be used at the VCC input; ceramic, low ESR
capacitor are not recommended.
Both capacitors must be located at a distance of
not modre than 0.5" from the input pins of the
device and returned to a clean analog ground.
OUTPUT CAPACITORThe ST3L01 is designed specifically to work with
Ceramic and Tantalum capacitors.
The test results of the ST3L01 stability using
multilayer ceramic capacitors show that a
minimum value of 0.1μF is needed for the three
regulators. This value can be increased for even
better transient response and noise performance.
Surface-mountable solid tantalum capacitors offer
a good combination of small physical size for the
capacitance value and ESR in the range need by
the ST3L01. The test results show good stability
for both outputs with values of at least 0.1μF. Also
this capacitor value can be increased without limit
for even better performance such a transient
response and noise.
IMPORTANT; The output capacitor must maintainits ESR in the stable region over the full operating
temperature to assure stability. Also , capacitor
tolerance and variation with temperature must be
considered to assure that the minimum amount of
capacitance is provided at all times. For this
reason, when a caramic multilayer capacitor is
used, the better choise for temperature coefficent
is the X7R type, which holds the capacitance
within ±15% . The output capacitor should be
located not more than 0.5" from the output pins of
the device and returned to a clean analog ground.
ST3L015/12
TYPICAL CHARACTERISTICS (CCC =1μF (tant), CDD =100nF (X7R), All CO =100nF (X7R))
Figure 1 : Output Voltage vs Temperature
Figure 2 : Output Voltage vs Temperature
Figure 3 : Output Voltage vs Temperature
Figure 4 : Load Regulation vs Temperature
Figure 5 : Load Regulation vs Temperature
Figure 6 : Load Regulation vs Temperature ST3L016/12
Figure 7 : Dropout Voltage vs Temperature
Figure 8 : Dropout Voltage vs Temperature
Figure 9 : Dropout Voltage vs Temperature
Figure 10 : Dropout Voltage vs Output Current
Figure 11 : Dropout Voltage vs Output Current
Figure 12 : Dropout Voltage vs Output Current
