Holtek HT7825 500ma tinypowertm ldo Datasheet

HT78XX Series
500mA TinyPowerTM LDO
Features
· Output voltage ranges: Fixed range of 1.8V, 2.5V,
· Low quiescent current: 5mA (typ.)
2.7V, 3.0V, 3.3V, 5.0V type.
· Current limiting
· Highly accuracy: ±2%
· Over-temperature shutdown
· Low voltage drop: 360mV (typ.),
· SOT-89, TO-92 Packages
VOUT=5.0V at 500mA
· Guaranteed output current: 500mA
Applications
· Battery powered systems
· PCMCIA cards
· Personal Digital Assistants
· Personal Communication Equipment
· Peripheral cards
General Description
as fixed voltage regulators, these devices can be used
with external components to obtain variable voltages
and currents.
The HT78XX series of positive, linear regulators features low quiescent current (5mA typ.) with low dropout
voltage, making them ideal for battery applications. The
devices are capable of supplying 500mA of output current continuously.
These rugged devices have Thermal Shutdown and
Current Limiting to prevent device failure under the
²Worst² of operating conditions.
They are available with several fixed output voltages
ranging from 1.8V to 5.0V. Although designed primarily
Selection Table
Part No.
Output Voltage
HT7818
1.8V
HT7825
2.5V
HT7827
2.7V
HT7830
3.0V
HT7833
3.3V
HT7850
5.0V
Tolerance
Package
±2%
SOT-89
TO-92
Block Diagram
V IN
V O U T
O v e rc u rre n t
S h u td o w n
T h e rm a l
S h u td o w n
R 1
A M P
V
re f
R 2
G N D
Rev. 1.00
1
March 2, 2007
HT78XX Series
Pin Assignment
S O T -8 9
T O -9 2
H T 7 8 X X
H T 7 8 X X
G N D
V IN
F r o n t V ie w
T o p V ie w
V O U T
G N D
V IN
V O U T
B o tto m
G N D
V IN
V O U T
G N D
V IN
V ie w
V O U T
N o te : F o r le a d fr e e d e v ic e s , a # m a r k is s u ffix e d a t th e e n d o f th e d a te c o d e .
Absolute Maximum Ratings*
Storage Temperature .......................... -50°C to 125°C
Maximum Supply Voltage ............................ up to 8.5V
Operating Temperature ......................... -40°C to 85°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.
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
0.50
W
TO-92
0.50
W
Power Dissipation
Note: PD is measured at Ta= 25°C
Rev. 1.00
2
March 2, 2007
HT78XX Series
Electrical Characteristics
Symbol
Tj=25°C, VIN=VOUT+1.0V, IO=1mA, unless otherwise specified
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Input Voltage
¾
¾
¾
8
V
DVOUT
Output Voltage Tolerance
¾
-2
¾
2
%
ISS
Quiescent Current
IO=0mA
¾
5
7
mA
DVLOAD
Load Regulation (Note1)
1mA£IOUT£500mA
%/mA
¾
0.004
0.008
VO£1.8V
¾
800
1200
2.5V£VO£2.7V
¾
500
650
VDROP
Dropout Voltage (Note2)
DVOUT=2%
IOUT=500mA
DVLINE
Line Regulation
VOUT+1.0V£VIN£8.0V
ILIM
Current Limit (Note3)
DVOUT=10%
Temperature Coefficient
-40°C<Ta<85°C
D V O
D T
U T
a
Note:
3.0V£VO£5.0V
mV
¾
360
500
¾
0.2
0.3
%/V
500
¾
¾
mA
¾
±0.8
¾
mV/°C
1. 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.
2. 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+1V with a fixed load.
3. Current limit is measured by pulsing for a short time.
Application Circuits
Basic Circuits
V
H T 7 8 X X
S e r ie s
V IN
IN
G N D
C 1
1 m F
V
V O U T
O U T
C 2
2 .2 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
Typical Application Circuits
· High output current positive voltage regulator
IC
T r1
V
H T 7 8 X X
S e r ie s
V IN
IN
R 1
IR
V
=
IR
IO = IC
IO
E G
S in g le p o in t G N D
1
O U T
C 2
1 0 m F
C o m m o n
R
V
V O U T
G N D
C 1
1 0 m F
Rev. 1.00
1
B E 1
IC
E G
-
1
+ IR
1
C o m m o n
,
(1 + b )
E G
3
March 2, 2007
HT78XX Series
· Increased Output voltage Circuit
V
V IN
IN
C 1
1 0 m F
IS
C 2
1 0 m F
G N D
S
V
V O U T
H T 7 8 X X
S e r ie s
V
O U T
R 1
X X
R 2
C o m m o n
S in g le p o in t G N D
VOUT = VXX (1+
C o m m o n
R2
) + ISS R2
R1
· Dual Supply Circuit
IC 1
V
V IN
IN
IC 2
V IN
V
V
G N D
H T 7 8 X X
S e r ie s
C 1
1 0 m F
V O U T
H T 7 8 X X
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 7 8 X X
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
4
O
RA
RB
March 2, 2007
HT78XX Series
Package Information
3-Pin SOT-89 Outline Dimensions
I
A
J
B
C
E
D
G
F
Symbol
Rev. 1.00
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
5
March 2, 2007
HT78XX Series
3-Pin TO-92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
Rev. 1.00
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°
6
March 2, 2007
HT78XX Series
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOT-89
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. 1.00
17-0.4
7
March 2, 2007
HT78XX Series
TO-92 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. 1.00
8
March 2, 2007
HT78XX Series
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
SOT-89
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
12.0+0.3
-0.1
P
Cavity Pitch
8.0±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±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. 1.00
0.30±0.013
9.3
9
March 2, 2007
HT78XX Series
TO-92 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
TO-92
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. 1.00
10
March 2, 2007
HT78XX 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
11
March 2, 2007
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