Holtek HT1117-ADJ 1a general purpose ldo Datasheet

HT1117 Series
1A General Purpose LDO
Features
· Output voltage ranges: Fixed range of 1.8V, 2.5V,
· Guaranteed output current: 1A
2.85V, 3.3V, 5.0V or adjustable type.
· Low quiescent current: 8mA (typ.)
· High accuracy: ±2%
· Integrated current limit & thermal protection circuits
· Low voltage drop: 1.1V (typ.), VOUT=5.0V at 1A
· SOT-223 package
Applications
· Active SCSI terminations
· Motherboard clock supplies
· Post regulator for switching power supplies
· Battery chargers
· Low voltage microcontrollers
General Description
fixed output voltage type with a range of 1.8V to 5.0V. Internal current limit and thermal protection circuits provide protection against overload conditions that could
create excessive junction temperatures.
The HT1117 devices are a series of three-terminal high
current low voltage regulators. They can deliver an output current of 1A and can accept input voltages up to
12V. The devices are available in both adjustable and
Selection Table
Note:
Part No.
Output Voltage
HT1117-ADJ
Adjust
HT1117-18
1.8V
HT1117-25
2.5V
HT1117-28
2.85V
HT1117-33
3.3V
HT1117-50
5.0V
Package
Marking
SOT-223
HT1117-ADJ
HT1117-18
HT1117-25
HT1117-28
HT1117-33
HT1117-50
For lead free devices, a ²#² mark is suffixed at the end of the date code.
Block Diagram
V
IN
V
O U T
C u rre n t
L im itin g
A m p lifie r
T h e rm a l
P r o te c tio n
E rro r
A m p .
B a n d g a p
R e fe re n c e
A D J
G N D
Rev. 1.00
1
August 7, 2007
HT1117 Series
Pin Assignment
S O T -2 2 3
1
H T 1 1 1 7 -X X
2
3
G N D /
A D J
V O U T
V IN
G N D /
A D J
V O U T
V IN
Absolute Maximum Ratings*
Input Supply Voltage ..................VSS-0.3V to VSS+13V
Storage Temperature ...........................-50°C to 125°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
²*² Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits.
The guaranteed specifications apply only for the test conditions listed.
Recommended Operating Conditions
Input Supply Voltage ..................VSS-0.3V to VSS+12V
Ambient Temperature ............................-40°C to 85°C
Thermal Information
Symbol
Parameter
Package
Max.
Unit
qJA
Thermal Resistance
(Junction to Ambient)
SOT-223
134
°C/W
PD
Power Dissipation
SOT-223
0.75
W
Note: PD is measured at Ta= 25°C
Rev. 1.00
2
August 7, 2007
HT1117 Series
Electrical Characteristics
Symbol
VREF
TJ=25°C, VIN=VOUT+1.5V, IO=10mA, unless otherwise specified (see note 1)
Parameter
Reference Voltage
VOUT
Output Voltage
Test Conditions
Min.
Typ.
Max.
Unit
2.75V £ VIN £ 12V
1.225
1.250
1.275
V
HT1117-18
1.764
1.800
1.836
V
HT1117-25
2.45
2.50
2.55
V
HT1117-28
2.793
2.850
2.907
V
HT1117-33
3.234
3.300
3.366
V
HT1117-50
4.90
5.00
5.10
V
DVLOAD
Load Regulation (see note 2)
10mA £ IOUT £ 1A
1
¾
30
mV
DVLINE
Line Regulation
2.75V £ VIN £ 12V
¾
0.015
0.150
%/V
VDIF
Dropout Voltage (see note 3)
DVOUT=2%, IOUT=1A
¾
1.1
1.3
V
ILIMIT
Current Limit (see note 4)
DVOUT=10%
1
2.3
¾
A
IADJ
Adjust Pin Current
(Variable Version)
2.75V £ VIN £ 12V
¾
55
120
mA
ISS
Quiescent Current
(Fixed Version)
2.75V £ VIN £ 12V
¾
8
13
mA
RR
Ripple Rejection
120Hz input ripple
COUT=22mF
¾
60
¾
dB
Temperature Coefficient
-40°C<Ta<85°C
¾
±0.4
¾
mV/°C
D V O
D T
U T
a
Note:
1. Specifications are production tested at room temperature, Ta. Specifications within the -40°C to 85°C
operating temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
2. Load regulation is measured at a constant junction temperature, using pulse testing with a low ON time and
is guaranteed up to the maximum power dissipation. Power dissipation is determined by the input/output
differential voltage and the output current. Guaranteed maximum power dissipation will not be available over
the full input/output range. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(MAX) - Ta) / qJA.
3. Dropout voltage is defined as the input voltage minus the output voltage that produces a 2% change in the
output voltage from the value at VIN = VOUT+1.5V with a fixed load.
4. Current limit is measured by pulsing for a short time.
Rev. 1.00
3
August 7, 2007
HT1117 Series
Application Circuits
Basic Circuits
· Variable voltage type
V
IN
V IN
C 1
1 0 m F
V
R 1
1 2 5 W
R E F
A D J
IA
V
O U T
V O U T
H T 1 1 1 7 -A D J
D J
C 2
1 0 m F
R 2
1 k W
C o m m o n
C o m m o n
S in g le p o in t G N D
VOUT = VREF ( 1 +
Note:
R2
) + IADJ R2
R1
C1 is required if the needed if the device is located far from filter capacitors, the recommended value is 10mF.
C2 is required for stability, the recommended value is 10mF.
R1 is required for regulation, the recommended value is 125W.
· Fixed voltage type
V
IN
H T 1 1 1 7
S e r ie s
V IN
G N D
C 1
1 0 m F
C o m m o n
Note:
V
V O U T
O U T
C 2
1 0 m F
C o m m o n
S in g le p o in t G N D
C1 is required if the needed if the device is located far from filter capacitors, the recommended value is 10mF.
C2 is required for stability, the recommended value is 10mF.
Typical Application Circuits
· 1.25V~10.5V regulator
2 .7 5 £ V
IN
£ 1 2 V
C 1
1 0 m F
V IN
V
A D J
IA
V
V O U T
H T 1 1 1 7 -A D J
D J
R E F
R 1
1 2 5 W
O U T
C 2
1 0 m F
R 2
1 k W
C o m m o n
C o m m o n
S in g le p o in t G N D
Rev. 1.00
4
August 7, 2007
HT1117 Series
· Digitally selected outputs
V
IN
V IN
V
V O U T
H T 1 1 1 7 -A D J
O U T
R 1
1 2 5 W
A D J
C 1
1 0 m F
C 2
1 0 m F
R 2
R 3
R 4
R 5
R n
C o m m o n
C o m m o n
S in g le p o in t
G N D
In p u ts
N o te : R 2 c a n s e t th e m a x im u m
v o lta g e .
· High output current positive voltage regulator
IC
T r1
V
H T 1 1 1 7
S e r ie s
V IN
IN
1
R 1
V
V O U T
IR
IO
E G
G N D
C 1
1 0 m F
C 2
1 0 m F
C o m m o n
C o m m o n
S in g le p o in t G N D
R
1
V
=
IR
IO = IC
O U T
B E 1
IC
E G
-
1
+ IR
1
,
(1 + b )
E G
· Increased Output voltage Circuit
V
V IN
IN
C 1
1 0 m F
IS
S
V
V O U T
H T 1 1 1 7
S e r ie s
C 2
1 0 m F
G N D
V
X X
O U T
R 1
D 1
C o m m o n
S in g le p o in t G N D
C o m m o n
VOUT = VXX + VD1
VXX
ISS
R1 =
Rev. 1.00
5
August 7, 2007
HT1117 Series
· Dual Supply Circuit
IC 1
V
V IN
IN
IC 2
V IN
V
V
G N D
H T 1 1 1 7
S e r ie s
C 1
1 0 m F
V O U T
H T 1 1 1 7
S e r ie s
X X 1
O U T 1
C 3
1 0 m F
V O U T
V
C 2
1 0 m F
G N D
C o m m o n
R 1
V
O U T 2
X X 2
C o m m o n
S in g le p o in t G N D
VOUT1 = VXX2 + VXX1
VOUT2 = VXX2
· Tracking Voltage Regulator
V
V IN
IN
C 1
1 0 m F
V
V O U T
H T 1 1 1 7
S e r ie s
C 2
1 0 m F
G N D
R
A
R
B
O U T
S in g le p o in t G N D
-V
-V
IN
-VO = VO x
Rev. 1.00
6
O
RA
RB
August 7, 2007
HT1117 Series
Package Information
D
q
g a u g e p la n e
s e a tin g p la n e
3-pin SOT-223 Outline Dimensions
L
E 1
E
e
A 2
A
e 1
A 1
c
b
Symbol
Rev. 1.00
Dimensions in mm
Min.
Nom.
Max.
A
¾
¾
1.8
A1
0.02
¾
0.10
A2
1.50
¾
1.70
b
0.66
¾
0.84
C
0.23
¾
0.35
D
6.30
¾
6.70
E
6.70
¾
7.30
E1
3.30
¾
3.70
e
¾
2.3
¾
e1
¾
4.6
¾
L
0.75
¾
¾
q
0°
¾
10°
7
August 7, 2007
HT1117 Series
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOT-223
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330±1
B
Reel Inner Diameter
62±1.5
C
Spindle Hole Diameter
12.75±0.15
D
Key Slit Width
T1
Space Between Flange
12.4+0.2
T2
Reel Thickness
16.4-0.4
Rev. 1.00
2+0.6
8
August 7, 2007
HT1117 Series
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
SOT-223
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
12±0.3
P
Cavity Pitch
8±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
5.5±0.05
D
Perforation Diameter
1.5+0.1
D1
Cavity Hole Diameter
1.5+0.1
P0
Perforation Pitch
4±0.1
P1
Cavity to Perforation (Length Direction)
2±0.05
A0
Cavity Length
6.9±0.1
B0
Cavity Width
7.5±0.1
K0
Cavity Depth
2.1±0.1
t
Carrier Tape Thickness
0.3±0.05
C
Cover Tape Width
Rev. 1.00
9.3
9
August 7, 2007
HT1117 Series
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http://www.holtek.com.tw
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Copyright Ó 2007 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.00
10
August 7, 2007
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