SIRECT MT1117A 1a ldo linear voltage / regulator Datasheet

E
L
E
C
T
R
O
N
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MT1117
C
1A LDO LINEAR VOLTAGE / REGULATORS
◆
DESCRIPTION
The MT1117 series are low-drop-out ( LDO ) linear
regulators. The devices have been optimized
for applications where fast transient response and
minimum input voltages are critical. The internal
over-current protection and thermal protection ,makes
the device extremely easy to use in a wide range of
applications.
◆
◆
FEATURES
* Low dropout performance
* Output current of 800mA typical
* Wide range input supply voltage
* Thermal shutdown protection
* Fixed 1.8V, 2.5V, 3.3V output voltages available
* SOT-223 packages available
APPLICATIONS
* Active SCSI terminators
* High efficiency linear regulators
* Motherboard clock supplies
◆
PIN CONFIGURATIONS
SOT-223
TO-252
(Top View)
(Top View)
1
2
3
1
1: GND, 2: OUT, 3: IN
◆
2
3
1: OUT, 2: GND, 3: IN
ABSOLUTE MAXTMUM RETINGS
SYMBOL
PARAMETER
MAXIMUM
UNITS
V
VIN
Input supply voltage
7
θJC
Thermal resistance junction to case
SOT-223
TO-252
15
10
O
C/W
θJA
Thermal resistance junction to ambient
SOT-223
TO-252
156
90
O
C/W
O
TJ
Operating junction temperature range
0 to 125
C
O
TSTG
Storage temperature range
- 40 to 150
C
O
TLEAD
Lead temperature (soldering) 10sec
260
C
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents
are positive into, negative out of the specified terminal.
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MT1117
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ORDERING INFORMATION
DEVICE
MT1117A
A
MT1117-X.X A
◆
VOUT VOLTS
TA (OC)
X.X_ 1.5 / 1.8 / 2.5 / 2.8 / 3.0 / 3.3
0~70
PACKAGE
SOT-223
POWER DISSIPATION TABLE:
Package
θJA
( C /W )
O
Df( mW/ C)
O
TA≥ 25 C
O
TA≤ 25 C
Power rating(mW)
TA=70 OC
Power rating(mW)
TA= 85 OC
Power rating (mW)
A
156
7.35
919
588
478
O
Note :
1.θJA: Thermal Resistance-Junction to Ambient, DF : Derating factor, Po: Power consumption.
Junction Temperature Calculation:
TJ = TA + (PD × θJA), Po = DF × (TJ- TA)
The θJA numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
2.θJT: Thermal Resistance-Junction to Ambient, TC: case(Tab) temperature, TJ = TC + (PD × θJT)
For A package, θJT = 15.0 C /W.
O
For B package, θJT = 7.0 C /W.
O
◆
RECOMMENDED OPERATING CONDITIONS:
Parameter
Symbol
VIN
IO
CIN
COUT
TJ
◆
Input Voltage
Load Current (with adequate heatsinking)
Input Capacitor (VIN to GND)
Output Capacitor with ESR of 10Ω max., (VOUT to GND)
Recommended Operating
Min.
Typ.
Max.
3
6
0.1
1.0
4.7
Junction temperature
125
Units
V
mA
μF
μF
O
C
TYPICAL APPLICATIONS:
Fixed Voltage Regulator:
VIN
VOUT
MT1117-X.X
CIN
1μF
IQ
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COUT
4.7μF
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MT1117
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ELECTRICAL CHARACTERISTICS:
O
Operating Conditions: 3V≦ VIN ≦ 6V, TJ = 0~125
SYMBOL
PARAMETER
C unless otherwise specified.
TEST CONDITION
MIN
TYP
MAX
UNITS
10mA≤ IOUT≤ 1A
TA=25 OC,
MT1117-1.5, 3V ≤ VIN ≤ 5.5V
MT1117-1.8, 3V ≤ VIN ≤ 5.5V
MT1117-2.5, 3.5V ≤ VIN ≤ 5.5V
MT1117-2.8, 3.8V ≤ VIN ≤ 5.5V
MT1117-3.0, 4V ≤ VIN ≤ 5.5V
MT1117-3.3, 4.3V ≤ VIN ≤ 5.5V
(VOUT+1V) ≤ VIN ≤ 5.5V
IOUT=10mA
1.764
2.450
3.234
1.8
2.5
3.3
1.836
2.550
3.366
V
V
V
0.005
1.0
%
VO
Output Voltage (1)
VSR
Line Regulation (1)
VLR
Load Regulation (1)
10mA≤ IOUT≤ 1A
0.5
%
VD
Dropout Voltage (2)
VIN≥2V, IOUT=1A
0.65
V
ICL
Current Limit
(VIN-VOUT)=2V
1.5
A
IQ
Quiescent Current
VIN=VOUT+1.25
1
mA
IO
Minimum Load Current
1.5V≤ (VIN-VOUT) ≤ 5.75V
RA
Ripple Rejection Ratio
f = 120Hz,
0.1
mA
75
dB
NOTES:
(1) Low duty cycle pulse testing with which TJ remain unchanged.
(2) Δ VOUT, ΔVREF = 1%
TYPICAL PERFORMANCE CHARACTERISTICS:
O
VIN= 5V,CIN=10μF,COUT= 22μF,TA=25 C unless otherwise specified.
DROPOUT VOLTAGE vs. OUTPUT CURRENT
1.3
1.2
Dropout Voltage (V)
◆
1.1
1
0.9
0.8
0.7
0.6
0.5
10
100
300
500
800
Output Current (mA)
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MT1117
◆
APPLICATION NOTE:
1. Maximum Power Dissipation Calculation:
PD(max) = [(VIN(max) - VO(nom))] × IO(nom) + VIN(max) × IQ
Where: VO(nom) : The nominal output voltage
IO(nom) : The nominal output current, and
IQ : The quiescent current the regulator consumes at IO(MAX)
VIN(max) : The maximum input voltage
Then θJA = (150 OC – TA) / PD
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PHYSICAL DIMENSIONS:
3-Pin Surface Mount SOT-223(A)
MILLIMETERS
D
A
MIN
TYP
MAX
A
1.50
1.65
1.80
A1
0.02
0.05
0.08
B
0.60
0.70
0.80
c
B1
H
E
K
L
e
A1
e1
B1
2.90
-
3.15
c
0.28
0.30
0.32
D
6.30
6.50
6.70
E
3.30
3.50
3.70
e
2.3 BSC
e1
4.6 BSC
H
6.70
7.00
7.30
L
0.91
1.00
1.10
K
1.50
1.75
2.00
α
0°
5°
10°
β
B
3°
Sirectifier Global Corp., Delaware, U.S.A.
U.S.A.: [email protected]
France: [email protected]
Taiwan: [email protected]
Hong Kong: [email protected]
China: [email protected] …Thailand: [email protected]
Philippines: [email protected] Belize: [email protected]
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