GM6251
ULTRA - LOW DROPOUT POSITIVE VOLTAGE REGULATOR
Power Management
Features
Description
Maximum output current 250mA (within
The GM6251's combine high accuracy with very low power
maximum power dissipation)
consumption, providing high output current even when the
Output voltage: from 1.8 V to 6.0V in 0.1V
application requires extremely low input-output voltage dif-
increments
ferential.
Output voltage ±2%
The GM6251's include a precision voltage reference, an er-
CMOS low power consumption, typically
ror correction circuit, over-temperature protection, and a
1.0µA at VOUT = 5.0V
current limited output driver. Fast transient response to
Input stability typically 0.2%/ V
load variations provides excellent stability under dynamic
Ultra-low dropout voltage 0.38V @ IOUT =
load conditions.
200mA at VOUT = 5.0V
The GM6251's come in SOT-25 (150mW), SOT-89
(500mW) and TO-92 packages.
Small input/ output differential:
0.4V at 160mA (VOUT = 3.3V)
SOT-25 (150mW), SOT-89 (500mW) and
TO-92 packages
Application
Palmtops
Battery Powered Equipment
Portable Cameras
Reference Voltage Sources
Video Recorders
VIN
+C
IN
1µF
(Tantalum)
GM6251
VOUT
VSS
CL
+
RL
1µF
(Tantalum)
www.gammamicro.com
PRELIMINARY
GM6251
VIN
Revision 1, Jun. 2004
TYPICAL APPLICATION CIRCUITS
1
GM6251
MARKING INFORMATION & PIN CONFIGURATIONS(TOP VIEW)
SOT-25(SOT-23-5)
VOUT
NC
5
4
TO-92
6251
VV
AYWW
XXVYW
1
VIN
2
3
VSS
NC
SOT-89
GM6251
VVAYWW
1. VOUT
2. VSS
3. VIN
1
1
2
VOUT VSS
3
VIN
2 3
XX = Specific Device Code(FA = GM6251)
V
= Voltage Code
VV
= Voltage Suffix (18=1.8V ,50=5.0V)
A
= Assembly Location
Y
= Year
WW, W= Work Week
ORDERING INFORMATION
GM6251
Ordering Number
2
Output Voltage
Voltage Code
Package
Shipping
GM6251-1.8T92B
1.8V
TO-92
1,000 Units/ ESD Bag
GM6251-1.8T92RL
1.8V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-1.8ST25R
1.8V
SOT-25
3,000 Units/ Tape and Reel
GM6251-1.8ST89R
1.8V
SOT-89
1,000 Units/ Tape and Reel
GM6251-2.5T92B
2.5V
TO-92
1,000 Units/ ESD Bag
GM6251-2.5T92RL
2.5V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-2.5ST25R
2.5V
SOT-25
3,000 Units/ Tape and Reel
GM6251-2.5ST89R
2.5V
SOT-89
1,000 Units/ Tape and Reel
GM6251-2.7T92B
2.7V
TO-92
1,000 Units/ ESD Bag
GM6251-2.7T92RL
2.7V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-2.7ST25R
2.7V
SOT-25
3,000 Units/ Tape and Reel
GM6251-2.7ST89R
2.7V
SOT-89
1,000 Units/ Tape and Reel
GM6251-2.8T92B
2.8V
TO-92
1,000 Units/ ESD Bag
GM6251-2.8T92RL
2.8V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-2.8ST25R
2.8V
SOT-25
3,000 Units/ Tape and Reel
GM6251-2.8ST89R
2.8V
SOT-89
1,000 Units/ Tape and Reel
GM6251-3.0T92B
3.0V
TO-92
1,000 Units/ ESD Bag
GM6251-3.0T92RL
3.0V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-3.0ST25R
3.0V
SOT-25
3,000 Units/ Tape and Reel
GM6251-3.0ST89R
3.0V
SOT-89
1,000 Units/ Tape and Reel
E
G
T
H
J
* For detail Ordering Number identification, please see last page.
GM6251
Ordering Number
Output Voltage
Voltage Code
Package
Shipping
GM6251-3.2T92B
3.2V
TO-92
1,000 Units/ ESD Bag
GM6251-3.2T92RL
3.2V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-3.2ST25R
3.2V
SOT-25
3,000 Units/ Tape and Reel
GM6251-3.2ST89R
3.2V
SOT-89
1,000 Units/ Tape and Reel
GM6251-3.3T92B
3.3V
TO-92
1,000 Units/ ESD Bag
GM6251-3.3T92RL
3.3V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-3.3ST25R
3.3V
SOT-25
3,000 Units/ Tape and Reel
GM6251-3.3ST89R
3.3V
SOT-89
1,000 Units/ Tape and Reel
GM6251-3.5T92B
3.5V
TO-92
1,000 Units/ ESD Bag
GM6251-3.5T92RL
3.5V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-3.5ST25R
3.5V
SOT-25
3,000 Units/ Tape and Reel
GM6251-3.5ST89R
3.5V
SOT-89
1,000 Units/ Tape and Reel
GM6251-3.6T92B
3.6V
TO-92
1,000 Units/ ESD Bag
GM6251-3.6T92RL
3.6V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-3.6ST25R
3.6V
SOT-25
3,000 Units/ Tape and Reel
GM6251-3.6ST89R
3.6V
SOT-89
1,000 Units/ Tape and Reel
GM6251-4.0T92B
4.0V
TO-92
1,000 Units/ ESD Bag
GM6251-4.0T92RL
4.0V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-4.0ST25R
4.0V
SOT-25
3,000 Units/ Tape and Reel
GM6251-4.0ST89R
4.0V
SOT-89
1,000 Units/ Tape and Reel
GM6251-4.4T92B
4.4V
TO-92
1,000 Units/ ESD Bag
GM6251-4.4T92RL
4.4V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-4.4ST25R
4.4V
SOT-25
3,000 Units/ Tape and Reel
GM6251-4.4ST89R
4.4V
SOT-89
1,000 Units/ Tape and Reel
GM6251-4.5T92B
4.5V
TO-92
1,000 Units/ ESD Bag
GM6251-4.5T92RL
4.5V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-4.5ST25R
4.5V
SOT-25
3,000 Units/ Tape and Reel
GM6251-4.5ST89R
4.5V
SOT-89
1,000 Units/ Tape and Reel
GM6251-5.0T92B
5.0V
TO-92
1,000 Units/ ESD Bag
GM6251-5.0T92RL
5.0V
TO-92
2,000 Units/ Ammo Pack (Tape)
GM6251-5.0ST25R
5.0V
SOT-25
3,000 Units/ Tape and Reel
GM6251-5.0ST89R
5.0V
SOT-89
1,000 Units/ Tape and Reel
U
K
V
L
M
W
N
Q
* For detail Ordering Number identification, please see last page.
GM6251
ORDERING INFORMATION (Continued)
3
GM6251
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATINGS
VIN
12
V
Output Voltage
VOUT
VSS - 0.3 ~ VIN + 0.3
V
Output Current
IOUT
500
mA
PD
500
mW
Operating Ambient Temperature
Topr
-30 ~ +80
°C
Storage Temperature
Tstg
-40 ~ +125
°C
Input Voltage
Continuous Total Power
Dissipation (SOT - 89)
BLOCK DIAGRAM
VIN
VOUT
Current Limiter
+
Voltage
Reference
GM6251
VSS
4
UNITS
GM6251
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Output Voltage
Min
Typ
Max
GM6251-1.8V
1.764 1.800 1.836
GM6251-2.5V
2.450 2.500 2.550
GM6251-2.7V
2.646 2.700 2.754
GM6251-2.8V
2.744 2.800 2.856
GM6251-3.0V
2.940 3.000 3.060
GM6251-3.2V
3.136 3.200 3.264
GM6251-3.3V
(Note 2)
VOUT(E)
GM6251-3.5V
Maximum Output Current
Condition
IOUT=40mA,
VIN >VDrop+VOUT
3.234 3.300 3.366
3.528 3.600 3.672
GM6251-4.0V
3.920 4.000 4.080
GM6251-4.4V
4.312 4.400 4.488
GM6251-4.5V
4.410 4.500 4.590
GM6251-5.0V
4.900 5.000 5.100
VIN=3.0V, VOUT(E)
1.62V
GM6251-2.5V
VIN=4.0V, VOUT(E)
2.3V
GM6251-2.7V
VIN=4.0V, VOUT(E)
2.43V
GM6251-2.8V
VIN=4.0V, VOUT(E)
2.52V
GM6251-3.0V
VIN=4.0V, VOUT(E)
2.7V
GM6251-3.2V
VIN=4.0V, VOUT(E)
2.88V
VIN=4.0V, VOUT(E)
2.97V
GM6251-3.5V
VIN=5.0V, VOUT(E)
3.15V
GM6251-3.6V
VIN=5.0V, VOUT(E)
3.24V
GM6251-4.0V
VIN=5.0V, VOUT(E)
3.6V
GM6251-4.4V
VIN=6.0V, VOUT(E)
3.96V
GM6251-4.5V
VIN=6.0V, VOUT(E)
4.05V
GM6251-5.0V
VIN=6.0V, VOUT(E)
4.5V
GM6251-3.3V
IOUT max
V
1
mA
1
3.430 3.500 3.570
GM6251-3.6V
GM6251-1.8V
Unit Circuit
250
GM6251
Symbol
Parameter
5
GM6251
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Symbol
Parameter
Load Stability
Max
60mA
45
90
GM6251-2.5V
VIN=3.5V, 1mA IOUT
80mA
45
90
GM6251-2.7V
VIN=3.7V, 1mA IOUT
80mA
45
90
GM6251-2.8V
VIN=3.8V, 1mA IOUT
80mA
45
90
GM6251-3.0V
VIN=4.0V, 1mA IOUT
80mA
45
90
GM6251-3.2V
VIN=4.2V, 1mA IOUT
80mA
45
90
VIN=4.3V, 1mA IOUT
100mA
45
90
GM6251-3.5V
VIN=4.5V, 1mA IOUT
100mA
45
90
GM6251-3.6V
VIN=4.6V, 1mA IOUT
100mA
45
90
GM6251-4.0V
VIN=5.0V, 1mA IOUT
100mA
40
80
GM6251-4.4V
VIN=5.4V, 1mA IOUT
100mA
40
80
GM6251-4.5V
VIN=5.5V, 1mA IOUT
100mA
40
80
VIN=6.0V, 1mA IOUT
100mA
GM6251-3.3V
GM6251-2.5V
GM6251-2.7V
GM6251-2.8V
GM6251-3.0V
GM6251-3.2V
GM6251-3.3V
GM6251-3.5V
GM6251-3.6V
GM6251-4.0V
GM6251-4.4V
GM6251-4.5V
GM6251-5.0V
GM6251
Typ
VIN=2.8V, 1mA IOUT
GM6251-1.8V
6
Min
GM6251-1.8V
DVOUT
GM6251-5.0V
Input - Output
(Note 3)
Voltage Differential
Condition
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
Vdif1
Vdif2
IOUT = 60mA
IOUT = 160mA
IOUT = 80mA
IOUT = 160mA
IOUT = 80mA
IOUT = 160mA
IOUT = 80mA
IOUT = 160mA
IOUT = 80mA
IOUT = 160mA
IOUT = 80mA
IOUT = 160mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
IOUT = 100mA
IOUT = 200mA
40
80
180
900
180
550
180
400
180
400
180
400
180
400
170
400
120
380
120
380
170
400
120
380
120
380
120
380
360
1300
360
850
360
700
360
700
360
700
360
700
330
630
300
600
300
600
330
630
300
600
300
600
300
600
Unit Circuit
mV
1
mV
1
GM6251
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Supply Current
Condition
GM6251-1.8V
VIN = 2.8V
GM6251-2.5V
VIN = 3.5V
GM6251-2.7V
VIN = 3.7V
GM6251-2.8V
VIN = 3.8V
GM6251-3.0V
VIN = 4.0V
GM6251-3.2V
VIN = 4.2V
GM6251-3.3V
ISS
VIN = 4.3V
GM6251-3.5V
VIN = 4.5V
GM6251-3.6V
VIN = 4.6V
GM6251-4.0V
VIN = 5.0V
GM6251-4.4V
VIN = 5.4V
GM6251-4.5V
VIN = 5.5V
GM6251-5.0V
VIN = 6.0V
Output Current Limit
GM6251-2.5V
GM6251-2.7V
GM6251-2.8V
GM6251-3.0V
GM6251-3.2V
GM6251-3.3V
DVOUT
DVIN • VOUT
GM6251-3.5V
GM6251-3.6V
GM6251-4.0V
GM6251-4.4V
GM6251-4.5V
GM6251-5.0V
Input Voltage
Output Voltage
Temperature Characteristics
Typ
Max
1.0
2.9
IOUT = 40mA
2.8V VIN 10.0V
IOUT = 40mA
3.5V VIN 10.0V
IOUT = 40mA
3.7V VIN 10.0V
IOUT = 40mA
3.8V VIN 10.0V
IOUT = 40mA
4.0V VIN 10.0V
IOUT = 40mA
4.2V VIN 10.0V
IOUT = 40mA
4.3V VIN 10.0V
IOUT = 40mA
4.5V VIN 10.0V
IOUT = 40mA
4.6V VIN 10.0V
IOUT = 40mA
5.0V VIN 10.0V
IOUT = 40mA
5.4V VIN 10.0V
IOUT = 40mA
5.5V VIN 10.0V
IOUT = 40mA
6.0V VIN 10.0V
0.2
VIN
DVOUT
DTopr • VOUT
IOUT = 10mA
-30°C Topr 80°C
±100
Unit Circuit
µA
2
mA
-
0.3
%/ V
1
10
V
-
ppm/°C
1
500
GM6251-1.8V
Input Stability
Min
Note: 1. VOUT(T) = Specified Output Voltage
2. VOUT(E) = Effective Output Voltage (the output voltage when"VOUT(T) + 1.0V" is provided at the VIN pin while
maintaining a certain IOUT value)
3. Vdif = { VIN1 (Note 4) - VOUT (E)}
4. VIN1 = The input voltage at the time 98% of VOUT(E) is output (input voltage has been gradually reduced).
* Output Voltage from 1.8V to 6.0V in 0.1V increments ate available
GM6251
Symbol
Parameter
7
GM6251
DIRECTIONS FOR USE
Notes on Use
1. Please use this IC within the stipulated absolute maximum ratings as the IC is liable to malfunction
outside of such parameters.
2. There is a possibility theat oscillation may occur as a result of the impedance present between the
power supply and the IC's input. Where impedance is 10W or more, please use a capacitor (CIN)
of at least 1µF.
With a large output current, operations can be stabilised by increasing capacitor size (CIN). If CIN is
small and capacitor size (CL) is increased, there is a possibility of oscillation due to input impedance.
In such cases, operations can be stabilised by either increasing the size of CIN of decreasing the size
of CL.
3. Please ensure that output current (IOUT) is less than Pd ÷ (VIN - VOUT) and does not exceed the
stipulated continuous total power dissipation value (Pd) for the package.
TEST CIRCUIT
Circuit 1
GM6251
VIN
VO
VIN
+
1µF
(Tantalum)
A
+
VSS
1µF
(Tantalum)
V
Circuit 2
GM6251
GM6251
VIN
VO
8
VIN
VSS
A
Open
RL
GM6251
PERFORMANCE CHARACTERISTICS FOR GM6251 - 3.0
1.0
Input/ Output Voltage Diff.: VDIF (V)
3.0
Topr= 25°C
2.9
2.8
2.7
0
VIN=4V
CIN=1µF
CL=1µF
20
40
60
CIN=1µF
0.8 CL=1µF
0.6
0.4
0.2
-0.2
80 100 120 140 160 180
Topr= 25°C
0.0
0
20
40
Output Current: IOUT (mA)
Figure 1: Output Voltage vs.
Output Current
3.05
IOUT=1mA
Output Voltage: VOUT (V)
Output Voltage: VOUT (V)
100 120 140 160 180
3.10
2.80
40mA
2.60
10mA
Topr= 25°C
CIN=1µF
CL=1µF
2.40
IOUT=1mA
3.00
40mA
3.0
10mA
2.95
Topr= 25°C
CIN=1µF
CL=1µF
2.90
2.85
2.20
2.5
2.5
3
4
Input Voltage: VIN(V)
5
6
7
8
9
10
Input Voltage: VIN(V)
Figure 3: Output Voltage vs.
Input voltage
Figure 4: Output Voltage vs.
Input voltage
3.0
2.50
Topr= 25°C
Supply Current: ISS (µA)
Supply Current: ISS (µA)
80
Figure 2: Input/ Output Voltage differential
vs. Output Current
3.20
3.00
60
Output Current: IOUT (mA)
2.0
1.0
2.25
Topr= 25°C
2.00
1.75
1.50
0
0
2
4
6
8
10
Input Voltage: VIN(V)
Figure 5: Supply Current vs. Input
Voltage
3
4
5
6
7
8
9
Input Voltage: VIN(V)
Figure 6: Supply Current vs.
Input Voltage
10
GM6251
Output Voltage: VOUT (V)
3.1
9
GM6251
PERFORMANCE CHARACTERISTICS FOR GM6251- 3.0
6
5.0
6
5
2
4
0
3
Output Voltage
-2
2
IOUT= 1mA
CL=1µF
-4
4.5
4.0
4
IOUT= 1mA
CL=1µF
3
3.5
Output Voltage
2
1
-6
3.0
2.5
1
0
Time (0.4msec/ div)
Time (1msec/ div)
Figure 7: Input Transient Response 1
Figure 8: Input Transient Response 2
60
Ripple Rejection Rate :RR (dB)
Input Voltage
5
Input Voltage: VIN(V)
4
Output Voltage: VOUT (V)
Input Voltage: VIN(V)
Input Voltage
VIN= 4VDC+1VP-PAC
IOUT= 40mA, CL= 1µF
50
40
30
20
10
0
0.01
0.1
1
Ripple Frequency: f (kHz)
10
Figure 9: Ripple Rejection Rate
TO-92 PACKAGE OUTLINE DIMENSIONS
4.6 ± 0.1
3.6 ± 0.15
2°
2°
4.6 ± 0.1
D
2.3
1.45 ± 0.1
14.5 ± 0.5
GM6251
2°
2°
3 - 0.46
0.38 ± 0.015
1.27 1.27
Unit: mm
3.6 ± 0.15
10
1.3 ± 0.1
5°
5°
Output Voltage: VOUT (V)
6
GM6251
SOT-25(SOT-23-5) PACKAGE OUTLINE DIMENSIONS
2.9 ± 0.1
1.9 ± 0.05
0.13
0.95 ± 0.038
Pad Layout
F
0.028
0.7
0~0.1
0.15 ± 0.05
2.8 ± 0.1
0.094
2.4
0.65 ± 0.05
0.35 ± 0.03
5°
0.8 ± 0.05
0.037
0.095
0.037
0.095
0.074
1.9
5°
( Inches
mm )
1.10 ± 0.1
SOT-89 PACKAGE OUTLINE DIMENSIONS
4.50 ± 0.05
1.650 REF
2
R 0.13~3X
G
NO DRAFT~2
3
R 0.13~4X
4.20 ± 0.05
2.5 ± 0.05
45°
6°
1.00 ± 0.07
Units: mm
Pad Layout
1.50 ± 0.05
1.400 REF
R 0.1 MAX
0.7
0.46 ± 0.025
6°~2X
0.38 ± 0.01
1.5
R 0.13~2X
R 0.13~2X
6°~2X
Unit: mm
1
GM6251
3.00 ± 0.025
1.50
1.5
1.50
11
GM6251
ORDERING NUMBER
GM 6251 1.8 T92 B
Shipping
B: ESD Bag
RL: Ammo Pack
T: Tube
R: Tape & Reel
Gamma Micro.
Circuit Type
GM6251
Output Voltage
1.8: 1.8V, 2.5: 2.5V
2.7: 2.7V, 2.8: 2.8V
3.0: 3.0V, 3.3: 3.3V
3.5: 3.5V, 3.6: 3.6V
4.0: 4.0V, 4.4: 4.4V
4.5: 4.5V, 5.0: 5.0V
12
(Tape)
Package
ST25: SOT-25
T92: TO-92
ST89: SOT-89