Gamma GM6251-3.5ST25R 300ma ultra low dropout positive voltage regulator Datasheet

GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Description
Features
GM6251 combines high accuracy with very low
power consumption, and provides high output
current even when the application requires
extremely low input-output voltage dropout.
GM6251 includes a precision voltage reference,
an error correction circuit, over-temperature
protection, and a current limited output driver.
Fast transient response to load variations
provides excellent stability under dynamic loads.
GM6251 comes in SOT-25 (150mW), TO92 and
SOT-89 (500mW).
‹
Maximum output current up 300mA
‹
Output voltage from 1.5V to 5.0V in
0.1V increments
‹
Output voltage accuracy : ±2%
‹
CMOS low power consumption,
typically 1.0µA at VOUT = 5.0V
‹
Input stability: typically 0.2%/V
‹
Ultra low dropout voltage: 0.38V @ IOUT
= 200mV at VOUT = 5.0V
‹
SOT-25 (150mW), SOT-89 (500mW) and
TO-92 packages
Application
Palmtops
Battery Powered Equipment
Portable Cameras
Reference Voltage Sources
Video Recorders
Typical Application Circuits
GM6251-x.x
VOUT
CIN
1µF
(Tantalum)
VSS
RL
COUT
1µF
(Tantalum)
GM6251V1.00
VIN
VIN
www.gammamicro.com.tw
1
1
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Marking Information and Pin Configurations (Top View)
SOT25
VOUT
5
NC
4
FAVYW
TO92
6251
VV
AYWW
1
2
3
VIN VSS NC
GM6251V1.00
V: Voltage Code (see next page)
VV: Voltage suffix (18 = 1.8V, 50 = 5.0V…)
Y: Year
W: Week code
WW: Week
2
GM6251
VVAYWW
1
2
VOUT VSS
1 2 3
VOUTVSS VIN
2
SOT89
3
VIN
GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Ordering Number
Output Voltage
Voltage Code
GM6251-1.8T92B
GM6251-1.8T92RL
GM6251-1.8ST25R
1.8V
E
GM6251-1.8ST89R
GM6251-2.5T92B
GM6251-2.5T92RL
GM6251-2.5ST25R
2.5V
G
GM6251-2.5ST89R
GM6251-2.7T92B
GM6251-2.7T92RL
GM6251-2.7ST25R
2.7V
T
GM6251-2.7ST89R
GM6251-2.8T92B
GM6251-2.8T92RL
GM6251-2.8ST25R
2.8V
H
GM6251-2.8ST89R
GM6251-3.0T92B
GM6251-3.0T92RL
GM6251-3.0ST25R
GM6251-3.0ST89R
3.0V
J
Package
Shipping
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
GM6251V1.00
Ordering Information
3
3
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Ordering Information (Continued)
Ordering Number
Output Voltage
Voltage Code
GM6251-3.2T92B
GM6251-3.2T92RL
GM6251-3.2ST25R
3.2V
U
GM6251-3.2ST89R
GM6251-3.3T92B
GM6251-3.3T92RL
GM6251-3.3ST25R
3.3V
K
GM6251-3.3ST89R
GM6251-3.5T92B
GM6251-3.5T92RL
GM6251-3.5ST25R
3.5V
V
GM6251-3.5ST89R
GM6251-3.6T92B
GM6251-3.6T92RL
GM6251-3.6ST25R
3.6V
L
GM6251-3.6ST89R
GM6251-4.0T92B
GM6251-4.0T92RL
GM6251-4.0ST25R
4.0V
M
GM6251-4.0ST89R
GM6251-4.4T92B
GM6251-4.4T92RL
GM6251-4.4ST25R
4.4V
W
GM6251-4.4ST89R
GM6251-4.5T92B
GM6251-4.5T92RL
GM6251-4.5ST25R
4.5V
N
GM6251V1.00
GM6251-4.5ST89R
GM6251-5.0T92B
GM6251-5.0T92RL
GM6251-5.0ST25R
GM6251-5.0ST89R
4
4
5.0V
Q
Package
Shipping
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
TO-92
1,000 Units/Bag
TO-92
2,000 Units/Ammo Pack (Tape)
SOT-25
3,000 Units/Tape and Reel
SOT-89
1,000 Units/Tape and Reel
GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Absolute Maximum Ratings
PARAMETER
SYMBOL
RATINGS
UNITS
Input Voltage
VIN
12
V
Output Current
IOUT
500
mA
Output Voltage
VOUT
VSS – 0.3 to VIN +0.3
V
SOT-25
Continuous Total Power
Dissipation
150
PD
SOT-89
TO-92
mW
500
300
Operating Ambient Temperature
TA
- 40 to 125
℃
Storage Temperature
Tstg
- 65 to 150
℃
Block Diagram
VIN
VOUT
Current
Limit
Voltage
Reference
GM6251V1.00
VSS
5
5
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Electrical Characteristics (TA = 25℃, VIN = VOUT + 1V unless otherwise noted)
Parameter
Output Voltage
Min
Typ
Max
GM6251-1.8
1.764
1.800
1.836
GM6251-2.5
2.450
2.500
2.550
GM6251-2.7
2.646
2.700
2.754
GM6251-2.8
2,744
2.800
2.856
GM6251-3.0
2.940
3.000
3.060
GM6251-3.2
3.136
3.200
3.264
3.234
3.300
3.366
GM6251-3.5
3.430
3.500
3.570
GM6251-3.6
3.528
3.600
3.672
GM6251-4.0
3.920
4.000
4.080
GM6251-4.4
4.312
4.400
4.488
GM6251-4.5
4.410
4.500
4.590
GM6251-5.0
4.900
5.000
5.100
GM6251-3.3
Symbol
VOUT
Condition
IOUT = 40mA, VIN = VOUT + 1V
∆VOI
IOUT = 40mA,
VOUT + 1V < VIN < 10V
0.2
0.3
%/V
Load Regulation
∆VOL
1mA < IOUT < 80mA
0.02
0.03
%/mA
0.4
0.7
0.55
0.85
0.9
1.3
1.0
2.9
VOUT > 2.5V
2.0V < VOUT < 2.5V
∆V
IOUT = 180mA
GM6251V1.00
VOUT < 2.0V
6
V
Line Regulation
Dropout
Voltage
6
Unit
Current Consumption
IQ
Output Current Limit
ICL
500
V
µA
mA
GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Application Note
Notes on Usage
1.
It is recommended to operate the GM6251 series within the stipulated absolute maximum ratings
as the IC is liable to malfunction it is operated outside the ratings.
2.
There is a possibility of heat or oscillation as a result of the impedance present between the
power supply and the IC's input. Where impedance is greater 10Ω, it is recommend to use a
capacitor (CIN) of at least 1µF at the input terminal.
3.
With a large output current, operations can be stabilized by increasing capacitor size (CIN). If CIN
is too small and capacitance of (CL) is increased, there is a possibility of oscillation due to input
impedance. In such case, operation can be stabilized by either increasing the size of CIN or
decreasing the size of CL.
4.
Please ensure the output current (IOUT) is less than Pd ÷ (VIN - VOUT) and does not exceed the
stipulated continuous for total power dissipation value (Pd) for the package.
CALCULATING POWER DISSIPATION
The GM6251 series precision linear regulators include thermal shutdown and current limit circuitry to
protect the devices. However, high power regulators normally operate at high junction temperatures so
it is important to calculate the power dissipation and junction temperatures accurately to be sure that
you use and adequate heat sink.
The thermal characteristics of an IC depend four factors:
1.
Maximum Ambient Temperature TA (℃)
2.
Power Dissipation PD (Watts)
3.
Maximum Junction Temperature TJ (℃)
4.
Thermal Resistance Junction to ambient RJA (℃/W)
These relationship of these four factors is expressed by equation : TJ = TA + PD X RJA
GM6251V1.00
Maximum ambient temperature and power dissipation are determined by the design while the
maximum junction temperature and thermal resistance depend on the manufacturer and the package
type.
7
7
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Output Voltage – VOUT (V)
3.1
3.0
TOPR = 25°C
2.9
2.8
2.7
0
VIN = 4V
CIN = 1µF
CL = 11µF
20
40
60
80 100 120 140 160 180
Input-Output Voltage Difference– VDIF (V)
Typical Performance Characteristics (for GM6251-3.0)
1.0
CIN = 1µF
CL = 11µF
0.8
0.6
0.4
0.2
TOPR = 25°C
0.0
-0.2
20
40
60
80 100 120 140 160 180
Output Current: IOUT (mA)
Figure 2: Input/ Output Voltage differential
vs. Output Current
Figure 1: Output Voltage vs.
Output Current
3.10
Output Voltage: VOUT (V)
3.00
IOUT=1mA
2.80
40mA
2.60
10mA
TOPR = 25°C
CIN=1µF
CL=1µF
2.40
2.20
2.5
Output Voltage: VOUT (V)
3.20
TOPR = 25°C
CIN=1µF
CL=1µF
2.90
3
4
5
6
7
8
9
Figure 4: Output Voltage vs.
Input voltage
10
2.50
TOPR = 25°C
Supply Current: ISS(µA)
Supply Current:ISS(µA)
GM6251V1.00
2.95
Figure 3: Output Voltage vs.
Input voltage
2.0
1.0
2.25
TOPR = 25°C
2.00
1.75
1.50
0
2
4
6
8
Figure 5: Supply Current vs.
Input Voltage
8
10mA
Input Voltage: VIN(V)
Input Voltage: VIN(V)
8
40mA
Input Voltage: VIN (V)
3.0
0
IOUT=1mA
3.00
2.85
3.5
3.0
3.05
10
3
4
5
6
7
8
9
Input Voltage: VIN(V)
Figure 6: Supply Current vs.
Input Voltage
10
GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Typical Performance Characteristics (for GM6251-3.0, continued)
6
2
4
0
3
Output Voltage
-2
2
IOUT = 1mA
CL = 1µF
-4
-6
Time (0.4msec/div)
1
Input Voltage
0
Figure 7: Input Transient Response 1
5
4
IOUT = 1mA
CL = 1µF
1
4.0
3.5
3
2
4.5
Output Voltage
3.0
2.5
Time (1msec/div)
Figure 8: Input Transient Response 2
VIN = 4VDC + 1VPPAC
IOUT = 40mA
CL = 1µF
50
40
30
20
10
0
0.01
0.1
1
10
Ripple Frequency: f (kHz)
Figure 9: Ripple Rejection Rate
GM6251V1.00
Ripple Rejection Rate :RR (dB)
60
Input Voltage – VIN (V)
5
Output Voltage – VIOUT (V)
Input Voltage – VIN (V)
4
5.0
6
Input Voltage
Output Voltage – VIOUT (V)
6
9
9
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Package Outline Dimensions – SOT 25
Package Outline Dimensions – SOT 89
0.173 - 0.181
(4.39 - 4.59)
0.067 - 0.072
(1.70 - 1.82)
0.084 - 0.090
(2.13 - 2.28)
0.155 - 0.167
(3.94 - 4.24)
0.090 - 0.120
(2.28 - 2.59)
8
0.035 - 0.047
(0.89 - 1.19)
0.016 - 0.019
(0.33 - 0.48)
0.059 BSC
(1.49) BSC
GM6251V1.00
0.118 BSC
(2.99) BSC
10
10
0.055 - 0.063
(1.39 - 1.60)
0.015 - 0.017
(0.38 - 0.43)
GM6251
300mA ULTRA LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Package Outline Dimensions – TO 92
3.85 - 4.19
4.7 - 5.2
4.9 - 5.2
12.7 - 14.2
0.4 - 0.55
Typ.
1.22 - 1.32
Dimensions are in millimeters
GM6251V1.00
2.10 - 2.27
11
11
GM6251
300mA ULTR LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
Ordering Number
GM 6251 - 1.8
GM6251V1.00
APM Gamma
Micro
12
12
Circuit
Type
T92
B
Output
Voltage
Package Type
Shipping Type
1.8
2.5
3.3
5.0
T92: TO 92
ST89: SOT 89
ST25: SOT 25
B: Bag
RL: Ammo Pack (Tape)
T: Tube
R: Tape & Reel
=
=
=
=
1.8V
2.5V
3.3V
5.0V
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