HSMC H1085U, H1085-3.3U Datasheet
HI-SINCERITY
MICROELECTRONICS CORP.
H1085U Series
3A LOW DROPOUT POSITIVE VOLTAGE REGULATOR
Features
•
Low Dropout Voltage 1.2V at 3A.
•
Adjustable or Fixed Voltage.
•
Line Regulation Typically 0.015%.
•
Load Regulation Typically 0.05%.
•
Adjust Pin Current Less Than 90 uA.
•
Over Current Protection.
•
Thermal Protection.
Applications
•
High Efficiency Linear Regulators.
•
Post Regulators For Switching Supplies.
•
5V to 3.3V Voltage Converter.
•
Battery Charger.
Spec. No. : Preliminary Data
Issued Date : 1998.06.01
Revised Date : 1999.08.01
Page No. : 1/5
General Description
The H1085U is a 3A lo w-dropout positive voltage r egulator. It is available in fixed and adjustable output voltage
versions. Over Curr ent and thermal protection are int egrated onto the chip. Output cur rent will decrease whil e it
reaches the pre-set current or tem perature limit. The dropout voltage is specified at 1.2V Maximum at full rated
output current. H1085U Series provides excellent regulation over variations due to changes in line, load and
temperature. H1085U is three terminal regulator and available in popular packages.
Device Selection Guide
Device Output Voltage Package
H1085U 1.3V to 4V
H1085-3.3U 3.3
TO-263
Absolute Maximum Ratings
Parameter Symbol Maximum Units
Input Voltage V
Power Dissipation P
Thermal Resistance Junction To Case TO-263
Thermal Resistance Junction To Ambient TO-263
Operating Junction Temperature Range T
Storage Temperature Range T
Lead Temperature (Soldering) 10 Sec T
θ
θ
IN
D
JC
JA
j
STG
LEAD
Internally Limited W
7V
3
50
0 To 125
-65 To 150
260
°
C/W
°
C/W
°
°
°
C
C
C
Typical Application
DC
+
4.75V to
5.25V
H1085-3.3U
10uF
TAN
GND
10uF
TAN
Load
HSMC Product Specification
Block Diagram
HI-SINCERITY
MICROELECTRONICS CORP.
Current
Limiting
Amplifier
Spec. No. : Preliminary Data
Issued Date : 1998.06.01
Revised Date : 1999.08.01
Page No. : 2/5
Input
Electrical Characteristics
H1085U (adj version)
Parameter Symbol Test Conditions Min Typ Max Units
Reference Voltage
Adj Voltage
Line Regulation Reg
Load Regulation Reg
Dropout Voltage
∆
V
OUT
, ∆V
REF
=1%
Current Limit I
Temperature Coeff. T
Adjust Pin Current I
Adjust Pin Current Change
Temperature Stability T
Minimum Load Current I
RMS Output Noise V
Ripple Rejection Ratio R
V
REF
LINE
LOAD
V
D
S
C
adj
∆
I
adj
S
O
N
A
Thermal
Protection
Error
AMP
VIN=5V, IO=10mA, Tj=25°C
Bandcap
Reference
Output
ADJ/COM
1.238 1.250 1.262
VIN=5V, IO=10mA, Over Temp. 1.225 1.250 1.275
VIN=2.75~7V, IO=10mA, Tj=25°C
-0.0150.2
VIN=2.75~7V, IO=10mA, Over Temp. - 0.035 0.2
VIN=5V, IO=10mA~3A,Tj=25°C
- 0.05 0.3
VIN=5V, IO=10mA~3A, Over Temp. - 0.2 0.4
VIN=2.75~7V, IO=10mA~3A, Tj=25°C
-1VIN=2.75~7V, IO=10mA~3A, Over Temp. - 1 1.2
VIN=2.75~7V, Over Temp. 3 4.5 - A
VIN=2.75~7V, IO=10mA~3A - 0.005 VIN=2.75~7V, IO=10mA~3A,Tj=25°C
-55VIN=2.75~7V, IO=10mA~3A, Over Temp. - - 90
VIN=2.75~7V, IO=10mA~3A, Over Temp. - 0.2 5
VIN=5V, IO=500mA, Over Temp. - 0.5 - %
VIN=5V - 5 10 mA
Tj=25°C
-0.003- %
VIN=5V, IO=3A, Over Temp. 60 72 - dB
V
%
%
V
%/°C
uA
H1085-3.3U
Parameter Symbol Test Conditions Min Typ Max Units
Output Voltage
Fixed Voltage
Line Regulation Reg
Load Regulation Reg
Dropout Voltage
∆
V
, ∆V
OUT
Current Limit I
Quiescent Current
Fixed Model
Temperature Coeff. T
Temperature Stability T
RMS Output Noise V
Ripple Rejection Ratio R
REF
=1%
V
V
I
VIN=5V, IO=0A,Tj=25°C
O
VIN=5V, IO=0A, Over Temp. 3.234 3.3 3.366
VIN=4.5~7V, IO=0A, Tj=25°C
LINE
VIN=4.5~7V, IO=0A, Over Temp. - 0.035 0.2
VIN=5V, IO=0A~3A,Tj=25°C
LOAD
VIN=5V, IO=0A~3A, Over Temp. - 0.2 0.4
VIN=4.5~7V, IO=0A~3A, Tj=25°C
D
VIN=4.5~7V, IO=0A~3A, Over Te mp. - 1 1.2
VIN=4.5~7V, Over Temp. 3 4.5 - A
S
VIN=5V, IO=0A~3A,Over Temp. - 12 13 mA
Q
VIN=4.5~7V, IO=0A~3A - 0.005 -
C
VIN=5V, IO=500mA, Over Temp. - 0.5 - %
S
Tj=25°C
N
VIN=5V, IO=3A, Over Temp. 60 72 - dB
A
3.267 3.3 3.333
-0.0150.2
- 0.05 0.3
-1-
-0.003- %
HSMC Product Specification
V
%
%
V
%/°C
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