Holtek HT1087-50 0.5a general purpose ldo Datasheet

HT1087 Series
0.5A General Purpose LDO
Features
· Output voltage ranges: Fixed range of 1.5V, 1.8V,
· Guaranteed output current: 0.5A
2.5V, 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 0.5A
· SOT89, TO92 packages
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 1.5V to 5.0V. Internal current limit and thermal protection circuits provide protection against overload conditions that could
create excessive junction temperatures.
The HT1087 devices are a series of three-terminal high
current low voltage regulators. They can deliver an output current of 0.5A and can accept input voltages up to
12V. The devices are available in both adjustable and
Selection Table
Note:
Part No.
Output Voltage
HT1087-ADJ
Adjust
HT1087-15
1.5V
HT1087-18
1.8V
HT1087-25
2.5V
HT1087-33
3.3V
HT1087-50
5.0V
Package
Marking
SOT89
TO92
HT1087-ADJ
HT1087-15
HT1087-18
HT1087-25
HT1087-33
HT1087-50
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. 1.10
1
October 5, 2007
HT1087 Series
Pin Assignment
T O 9 2
S O T 8 9
H T 1 0 8 7 -X X
G N D / V O U T
A D J
V IN
V IN
G N D /A D J
V O U T
V O U T
G N D /
A D J
F r o n t V ie w
T o p V ie w
H T 1 0 8 7 -X X
V IN
B o tto m
V ie w
V IN
G N D /A D J
V O U T
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
qJA
PD
Parameter
Thermal Resistance
(Junction to Ambient)
(Assume no ambient airflow,
no heat sink)
Package
Max.
Unit
SOT-89
200
°C/W
TO-92
200
°C/W
SOT-89
0.5
W
TO-92
0.5
W
Power Dissipation
Note: PD is measured at Ta= 25°C
Rev. 1.10
2
October 5, 2007
HT1087 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
HT1087-15
1.470
1.500
1.530
V
HT1087-18
1.764
1.800
1.836
V
HT1087-25
2.450
2.500
2.550
V
HT1087-33
3.234
3.300
3.366
V
HT1087-50
4.900
5.000
5.100
V
DVLOAD
Load Regulation (see note 2)
IOUT=0.5A
1
¾
20
mV
DVLINE
Line Regulation
2.75V £ VIN £ 12V
¾
0.015
0.15
%/V
VDIF
Dropout Voltage (see note 3)
DVOUT=2%, IOUT=0.5A
¾
1.1
1.3
V
ILIMIT
Current Limit (see note 4)
DVOUT=10%
0.5
1.5
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. 1.10
3
October 5, 2007
HT1087 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 0 8 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 0 8 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
· 1.25~10.5V regulator
2 .7 5 V £ 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 0 8 7 -A D J
R E F
D J
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
VOUT = VREF ( 1 +
Rev. 1.10
4
R2
) + IADJ R2
R1
October 5, 2007
HT1087 Series
· Digitally selected outputs
V
IN
V IN
V
V O U T
H T 1 0 8 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 0 8 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 0 8 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. 1.10
5
October 5, 2007
HT1087 Series
· Dual Supply Circuit
IC 1
V
V IN
IN
IC 2
V IN
V
V
G N D
H T 1 0 8 7
S e r ie s
C 1
1 0 m F
V O U T
H T 1 0 8 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 0 8 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 = VOUT x
Rev. 1.10
6
O
RA
RB
October 5, 2007
HT1087 Series
Package Information
3-Pin SOT89 Outline Dimensions
I
A
J
B
C
E
D
G
F
Symbol
Rev. 1.10
H
Dimensions in mil
Min.
Nom.
Max.
A
173
¾
181
B
64
¾
72
C
90
¾
102
D
35
¾
47
E
155
¾
167
F
14
¾
19
G
17
¾
22
H
¾
59
¾
I
55
¾
63
J
14
¾
17
7
October 5, 2007
HT1087 Series
3-Pin TO92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
Rev. 1.10
Dimensions in mil
Min.
Nom.
Max.
A
170
¾
200
B
170
¾
200
C
500
¾
¾
D
11
¾
20
E
90
¾
110
F
45
¾
55
G
45
¾
65
H
130
¾
160
I
8
¾
18
a
4°
¾
6°
8
October 5, 2007
HT1087 Series
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOT89
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
180±1.0
B
Reel Inner Diameter
62±1.5
C
Spindle Hole Diameter
12.75+0.15
D
Key Slit Width
1.9±0.15
T1
Space Between Flange
12.4+0.2
T2
Reel Thickness
Rev. 1.10
17-0.4
9
October 5, 2007
HT1087 Series
TO92 Reel Dimensions (Unit: mm)
P a c k a g e U p ,
F la t S id e U p
3 0
P a c k a g e U p ,
F la t S id e D o w n
4 3
5 8
8 8
3 6 0
Rev. 1.10
10
October 5, 2007
HT1087 Series
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
SOT89
Symbol
W
Description
Dimensions in mm
Carrier Tape Width
12.0+0.3
-0.1
8.0±0.1
P
Cavity Pitch
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±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.10
A0
Cavity Length
4.8±0.1
B0
Cavity Width
4.5±0.1
K0
Cavity Depth
1.8±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.10
0.30±0.013
9.3
11
October 5, 2007
HT1087 Series
TO92 Carrier Tape Dimensions
P
D h
W 2
H 1
H
H 0
l1
W 0
t
W 1
W
F 1
F 2
D 0
P 2
P 0
TO92
Symbol
Note:
Description
Dimensions in mm
I1
Taped Lead Length
(2.5)
P
Component Pitch
12.7±1.0
P0
Perforation Pitch
12.7±0.3
P2
Component to Perforation (Length Direction)
6.35±0.4
F1
Lead Spread
2.5+0.4
-0.1
F2
Lead Spread
2.5+0.4
-0.1
Dh
Component Alignment
W
Carrier Tape Width
18.0+1.0
-0.5
W0
Hold-down Tape Width
6.0±0.5
W1
Perforation Position
9.0±0.5
W2
Hold-down Tape Position
H0
Lead Clinch Height
16.0±0.5
H1
Component Height
Less than 24.7
D0
Perforation Diameter
4.0±0.2
t
Taped Lead Thickness
0.7±0.2
H
Component Base Height
19.0±0.5
0±0.1
(0.5)
Thickness less than 0.38±0.05mm~0.5mm
P0 Accumulated pitch tolerance: ±1mm/20pitches.
( ) Bracketed figures are for consultation only
Rev. 1.10
12
October 5, 2007
HT1087 Series
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
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Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
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7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233
Tel: 86-21-6485-5560
Fax: 86-21-6485-0313
http://www.holtek.com.cn
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5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District,
Shenzhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
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Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752
Fax: 86-10-6641-0125
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Tel: 86-28-6653-6590
Fax: 86-28-6653-6591
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46729 Fremont Blvd., Fremont, CA 94538
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holmate.com
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. 1.10
13
October 5, 2007
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