SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Features and Benefits
▪
3 A Output Current
▪
0.7 V Maximum Dropout Voltage at I
O
= 3 A
▪
1
μA
Maximum Standby Current
▪
Adjustable 1.1 to 5 V Output Voltage
▪
Remote Voltage Sensing
▪
Foldback Current Limiting
▪
Thermal Protection
Description
Designed to meet the high-current requirements in industrial
and consumer applications; embedded core, memory, or logic
supplies; TVs, VCRs, and office equipment, the SI-3011ZF
voltage regulator offers the reduced dropout voltage and low
quiescent current essential for improved efficiency. This device
delivers a regulated output at up to 3 A. Integrated thermal
and overcurrent protection enhance overall system reliability.
Devices with fixed output voltages of 2.5 V or 3.3 V are also
available.
Quiescent current does not increase significantly as the dropout
voltage is approached, an ideal feature in standby/resume power
systems where data integrity is crucial. Regulator accuracy
and excellent temperature characteristics are provided by a
bandgap reference. An LS-TTL/CMOS-compatible input
gives the designer complete control over power up, standby, or
power down. A pnp pass element provides a dropout voltage of
less than 700 mV at 3 A of load current. Low output voltages
eliminate the need for expensive PWM buck converters. The
low dropout voltage permits more efficient regulation before
output regulation is lost.
This device is supplied in a fully molded TO-220-style 5-lead
flange-mounted, high power, isolated plastic package. A similar
device in a lower-power surface-mount plastic package is the
SI-3011ZD.
Applications
▪
TVs, VCRs, Electronic Games
▪
Embedded Core, Memory, or Logic Supplies
▪
Printers and Other Office Equipment
▪
Industrial Machinery
▪
Secondary-Side Stabilization of Multi-Output SMPS
Package: 5-pin TO-220
Not to scale
Pin-Out Diagram
VR
1
ENABLE
2
INPUT
3
GND
4
OUTPUT
5
SENSE
SI-3011ZF
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
Selection Guide
Part Number
SI-3011ZF
For the availability of parts meeting –40°C requirements, contact a Sanken Sales Representative.
Absolute Maximum Ratings
Characteristic
Input Voltage
Output Current
Enable Input Voltage
Junction Temperature
Storage Temperature
Symbol
V
I
I
O
V
E
T
J
T
stg
Output current rating is limited by input voltage, duty cycle, and
ambient temperature. Under any set of conditions, do not exceed
a junction temperature of +125°C.
Notes
Rating
10
3
6
125
–40 to 125
Units
V
A
V
ºC
ºC
Recommended Operating Conditions
Characteristic
DC Input Voltage
DC Output Current
Adjustable Voltage Range
Operating Junction Temperature
Symbol
V
I
I
O
V
ADJ
T
J
Conditions
Min.
–
0
1.2
–20
Max.
6
3
5
100
Unit
V
A
V
°C
Allowable Package
Power Dissipation
SI-3011ZF
SANKEN ELECTRIC CO., LTD.
2
SI-3011ZF
High-Current, Low-Dropout, 1.1 to 5 V Regulator
ELECTRICAL CHARACTERISTICS
at T
A
= 25°C, V
O
= 2.5 V adjusted, V
E
= 2V, unless otherwise noted
Characteristics
Output Voltage
Output Voltage Temperature
Coefficient
Internal Reference Voltage
Output Short-Circuit Current
2
Line Regulation
Load Regulation
Dropout Voltage
Ground Terminal Current
Enable Input Voltage
Enable Input Current
Ripple Rejection Ratio
Thermal Shutdown
1
Typical
2
Output
Symbol
V
O
V
O(off)
a
VO
V
ref
I
OM
∆V
O(∆VI)
∆V
O(∆IO)
V
I
(min) –
V
O
I
GND
V
EH
V
EL
I
EH
I
EL
PSRR
T
J
V
E
= 0 V
0°C
≤
T
J
≤
100°C
Test Conditions
V
I
= V
O(nom)
+ 1 V, I
O
= 10 mA
Min.
–
–
–
1.078
3.2
–
–
–
–
–
2.0
–
–
–
–
135
Typ.
1
V
O(nom)
–
±0.3
1.100
–
–
–
–
1.0
–
–
–
–
0
60
152
Max.
–
0.5
–
1.122
–
10
40
0.7
1.5
1.0
–
0.8
100
–5.0
–
–
Unit
V
V
mV/°C
V
A
mV
mV
V
mA
μA
V
V
μA
μA
dB
°C
V
I
= V
O(nom)
+ 1 V , I
O
= 10 mA
V
I
= V
O(nom)
+ 1 V
V
I
= 3.0 to 5.0 V, I
O
= 10 mA
V
I
= 3.3 V, I
O
= 0 to 3.0 A
I
O
= 3.0 A
V
I
= V
O(nom)
+ 1 V, I
O
= 0 mA, V
E
= 2.0 V
V
I
= V
O(nom)
+ 1 V, V
E
= 0 V
Output on
Output off
V
E
= 2.7 V
V
E
= 0 V
V
I
= V
O(nom)
+ 1 V, 100 Hz
≤
f
≤
120 Hz
values are given for circuit design information only.
short-circuit current is at the point where output voltage has decreased 5% below V
O(nom)
.
SI-3011ZF
SANKEN ELECTRIC CO., LTD.
4
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