GS2906V
600mA Ultra Low Dropout Regulator
Product Description
Features
The GS2906V is a high performance positive
voltage regulator designed for use in applications
requiring very low input voltage and very low
dropout voltage at 600mA amps. It operates with a
VIN as low as 1.8V, with output voltage
programmable as low as 0.8V.
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The GS2906V features ultra low dropout, ideal for
applications where VOUT is very close to VIN.
Additionally, the GS2906V has an enable pin to
further reduce power dissipation while shut down.
The enable pin may be tied to VIN if it is not
required for ON/OFF control. The GS2906V
provides excellent regulation over variations in
line, load and temperature.
The adjustable output version that can be
programmed from 0.8V to 5V with two external
resistors. The optimum thermal condition has to
consider the layout placement and application to
achieve its satisfied high output current
requirement.
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Typically 250mV Dropout @600mA
Input Voltage Range: 1.8V to 5.5V
Enable Function
Over Current and Over Temperature
Protection
5μA Quiescent Current in Shutdown
P-CH Design to Reduce the Operation
Current
Full Industrial Temperature Range
Adjustable Output Voltage Range 0.8V to 5V
Output Voltage Accuracy ±2%
Supply Current Typically 0.4mA
Built-In Over Shoot Protection Circuit
Ultra Fast Transient Response
Applications
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Notebook Computers
Battery Powered Systems
Motherboards/Peripheral Cards
Telecom/Networking Cards
Industrial Applications
Set Top Boxes
Wireless Infrastructure
Medical Equipment
GS2906V
Block Diagram
Fixed Voltage Type
Adjustable Voltage Type
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1
Typical Application Circuit
VOUT
VIN
VIN
VOUT
C1
C2
R1
GS2906V
EN
ADJ
R2
GND
VOUT=
0.8(R1+R2)
R2
Volts
Figure1. Adjustable Voltage Operation
Figure2. Fixed Voltage Operation
GS2906V
ENABLE
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2
Packages & Pin Assignments
PSOP-8
SOT-89-5L
Symbol
PIN NO. (ADJ)
PIN NO. (Fixed)
Symbol
PIN NO. (ADJ)
PIN NO. (Fixed)
VIN
1,2
1,2
VIN
4
4
VOUT
3,4
3,4
VOUT
5
5
GND
6
6
GND
2
2
NC
7
5,7
NC
-
3
EN
8
8
EN
1
1
ADJ
5
-
ADJ
3
-
SOT-23-5L
Symbol
PIN NO. (ADJ)
PIN NO. (Fixed)
VIN
1
1
VOUT
5
5
GND
2
2
NC
-
4
EN
3
3
ADJ
4
-
Pin Name
Pin Description
EN
Enable Input. Pulling this pin below 0.4V turn the regulator off, reducing the quiescent
current to a fraction of its operating value. The device will be enabled if this pin is left open.
Connect to VIN if not being used.
VIN
Input Voltage. A large bulk capacitance should be placed closely to this pin to ensure that
the input supply does not sag below 1.8V.
VOUT
The pin is the power output of the device.
For the adjustable versions of the GS2906V. This is the input to the error amplifier. The
ADJ reference voltage is 0.8Vreferenced to ground. The output range is 0.8V to 5V:
ADJ
GND
GS2906V
Pin Descriptions
Reference Ground.
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3
Ordering Information
SOT-23-5L
SOT-89-5L
PSOP-8
Output Voltage
GS2906VLF
GS2906VYF
GS2906VPSF
Adjustable
GS2906VL10F
GS2906VY10F
GS2906VPS10F
1.0V
GS2906VL12F
GS2906VY12F
GS2906VPS12F
1.2V
GS2906VL15F
GS2906VY15F
GS2906VPS15F
1.5V
GS2906VL18F
GS2906VY18F
GS2906VPS18F
1.8V
GS2906VL25F
GS2906VY25F
GS2906VPS25F
2.5V
GS2906VL28F
GS2906VY28F
GS2906VPS28F
2.8V
GS2906VL30F
GS2906VY30F
GS2906VPS30F
3.0V
GS2906VL33F
GS2906VY33F
GS2906VPS33F
3.3V
SOT-23-5L
SOT-89-5L
PSOP-8
SOT-23-5L
GS2906V
Marking Information
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4
Absolute Maximum Ratings (Note1)
Symbol
Parameter
Maximum
Unit
VIN
Supply Voltage
6
V
EN
Control Voltage
6
V
VOUT
Output Voltage
6
V
Junction Temperature
125
°C
TLEAD
Lead Temperature(Soldering) 5 Sec.
260
°C
TSTG
Storage Temperature Range
-65 to +150
°C
TJ
PD
θJA
θJC
VESD
Power Dissipation, PD @ TA=25°C(Note 2)
Thermal Resistance Junction to Ambient
Thermal Resistance Junction to Case
SOT-25
300
SOT-89-5L
641
PSOP-8
2770
SOT-25 (Note3)
333
SOT-89-5L
156
PSOP-8(Note4)
36
SOT-25
106.6
PSOP-8
5.5
ESD Rating (Human Body Model) (Note 5)
mW
°C/W
°C/W
2
kV
5.5
V
Recommended Operating Conditions (Note 6)
VIN
Supply Voltage
TJ
Operating Junction Temperature Range
-40 to +125
°C
TA
Operating Ambient Temperature Range
-40 to +85
°C
Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. Functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may remain possibility to affect device reliability.
Note 2: Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test
board in free air at TA=25°C.
Note 3: Thermal Resistance is specified with approximately 1 square of 1 oz copper.
Note 4: 2 square inch of FR-4, double sided, 1 oz. minimum copper weight.
Note 5: Devices are ESD sensitive. Handling precaution recommended.
GS2906V
Note 6: The device is not guaranteed to function outside its operating conditions.
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5
Electrical Characteristics
Unless specified: VEN=VIN. Adjustable version: VIN= 3.3V and ILOAD =10μA to 600mA,
Fixed version: VIN= VOUT + 0.8V and ILOAD=10μA to 600mA. TA =TJ =25°C
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
5.5
V
0.4
1.45
mA
5
10
uA
VOUT
2.0
%
1.0
%/V
VIN
VIN
Supply Voltage Range
1.8
ISS
Supply current
IQ
Quiescent Current
VIN= 5.5V, VEN=0V
VOUT
Output Voltage Accuracy
(Note 7)
VIN=VOUT + 0.8V,
ILOAD= 10mA
-2.0
Reg_line
Line Regulation (Note 7)
VIN=(VOUT + 0.8V) to 5.5V,
ILOAD =10mA
-1.0
Load Regulation (Note 7)
VOUT ≤ 2V
VIN=(VOUT+0.8V),10mA ≤ ILOAD≤600mA
VOUT >2V
VOUT
Reg_load
VD
ICL
Dropout
Voltage(Note7,8)
2.0
%
0.1
1.0
800
1.0V ≤ VOUT<1.2V
Fix. 1.2V ≤ VOUT ≤ 1.5V, ILOAD=600mA
1.5V< VOUT
550
650
250
350
Adj. VOUT =2.5V ILOAD=600mA
250
350
Current Limit (Note 7, 9)
mV
mA
900
ADJ (Adjustable Version Only)
VTH_ADJ
VADJ
Reference
Voltage(Note7)
Adjust
Pin
(Note10)
VIN= 3.3V, VADJ =VOUT, ILOAD=10mA
Current
0.788
VADJ= VREF
0.8
0.812
V
80
200
nA
EN
VIH
VIL
IEN
1.6
Enable Pin Threshold
Enable Pin Current
VEN=0V
V
1.5
0.4
V
10
uA
Over Temperature Protection
THI
THYST
High Trip Level
160
°C
Hysteresis
20
°C
Note 7: Low duty cycle pulse testing with Kelvin connections required.
Note 8:Defined as the input to output differential at which the output voltage drops to 2% below the value measured at a
differential of 0.8V.
Note 10: Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement.
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GS2906V
Note 9:Guaranteed by design.
6
Application Information
Introduction
The GS2906V is intended for applications where
high current capability and very low dropout voltage
are required. It provides a very simple, low cost
solution that uses very little PCB real estate.
Additional features include an enable pin to allow for
a very low power consumption standby mode.
Parallel a small cap (ex:100p) would be
recommended to improve the transient response.
Thermal Considerations
The power dissipation in the GS2906V is
approximately equal to the product of the output
current and the input to output voltage differential:
Component Selection
Input Capacitor:
PD ≈ (VIN - VOUT )×ILOAD
A minimum of 1μF ceramic capacitor is
recommended to be placed directly next to the VIN
pin. This allows for the device being some distance
from any bulk capacitance on the rail. Additionally,
bulk capacitance of about 100μF may be added
closely to the input supply pin of the GS2906V to
ensure that VIN does not sag, improves load
transient response.
The absolute worst-case dissipation is given by:
PD(MAX)=(VIN(MAX)-VOUT(MIN))xILOAD(MAX)
+VIN(MAX)xIG(MAX)
Output Capacitor:
A minimum of 2.2μF ceramic capacitor is
recommended. Increasing the bulk capacitance will
improve the overall transient response. The use of
multiple lower value ceramic capacitors in parallel to
achieve the desired bulk capacitance will not cause
stability issues. Although designed for use with
ceramic output capacitors, and thus will also work
comfortably with tantalum output capacitors.
For a typical scenario, VIN =3.3V ± 5%, VOUT=2.8V
and ILOAD =0.6A, therefore:
VIN(MAX)=3.465V,VOUT(MIN)=2.744V and
IG(MAX)=1.45μA,Thus PD(MAX)=0.437W
Using this formula, and assuming TA(MAX)=85°C,
we can calculate the maximum thermal
impedance allowable to maintain TJ ≤ 125°C
External Voltage Selection Resistors:
The use of 1% resistors, and consider for system
stability and power losing, we recommend to design
high dividing resistance (R1<100KΩ) to strengthen
the benefits which GS2906V has inherent.
Noise Immunity:
GS2906V
In very electrically noisy environments, it is
recommended that 0.1uF ceramic capacitors be
placed from VIN to GND and VOUT to GND as close
to the device pins as possible.
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7
Typical Performance Characteristics
GS2906V
Load Transient Response
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Typical Performance Characteristics (Continue)
GS2906V
Start Up
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Typical Performance Characteristics (Continue)
GS2906V
Start Up
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GS2906V
Typical Performance Characteristics (Continue)
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11
Package Dimension
SOT-23-5L
D
e1
E
G
E1
L
e
(L1)
b
c
A2
A
θ
A1
Dimensions
Millimeters
Inches
MIN
MAX
MIN
MAX
A
0.95
1.45
.037
.057
A1
0.05
0.15
.002
.006
A2
0.90
1.30
.035
.051
b
0.30
0.50
.012
.020
c
0.08
0.20
.003
.008
D
2.80
3.00
.110
.118
E
2.60
3.00
.102
.118
E1
1.50
1.70
.059
.067
e
0.95 (TYP)
.037 (TYP)
e1
1.90 (TYP)
.075 (TYP)
L
0.35
0.55
.014
.022
L1
0.60 (TYP)
.024 (TYP)
G
0.25 (TYP)
.010 (TYP)
θ
0°
8°
0°
8°
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GS2906V
SYMBOL
12
SOT-89-5L
D
D1
A
b1
H
e
b
e
b1
b
Dimensions
Millimeters
Inches
MIN
MAX
MIN
MAX
A
1.400
1.600
.055
.063
b
0.360
0.520
.014
.020
B1
2.400
2.600
.094
.102
b1
0.406
0.533
.016
.021
C
-
4.250
-
.167
C1
0.800
-
.031
.-
D
4.400
4.600
.173
.181
D1
-
1.700
-
.067
e
1.400
1.600
.055
.063
H
0.380
0.430
.014
.017
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GS2906V
SYMBOL
13
PSOP-8
Dimensions
A
A1
A2
b
b1
c
c1
D
D1
E
E1
E2
e
L
L1
R
R1
h
θ
θ1
θ2
Inches
MIN
MAX
MIN
MAX
0.08
1.20
0.39
0.38
0.21
0.19
4.70
1.77
0.28
1.60
0.48
0.43
0.26
0.21
5.10
.031
.047
.015
.015
.008
.007
.185
.070
.011
.063
.019
.017
.010
.008
.201
6.20
4.10
.228
.145
3.30 (TYP)
5.80
3.70
.130 (TYP)
2.40 (TYP)
1.27 (TYP)
0.40
.094 (TYP)
.050 (TYP)
1.27
.019
1.05 (TYP)
0.07
0.07
0.25
.244
.161
.005
.041 (TYP)
0.50
.003
.003
.010
0°
8°
0°
8°
5°
0°
15°
-
5°
0°
15°
-
GS2906V
SYMBOL
Millimeters
.020
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NOTICE
Information furnished is believed to be accurate and reliable. However Globaltech Semiconductor assumes no
responsibility for the consequences of use of such information nor for any infringement of patents or other rights of
third parties, which may result from its use. No license is granted by implication or otherwise under any patent or
patent rights of Globaltech Semiconductor. Specifications mentioned in this publication are subject to change
without notice. This publication supersedes and replaces all information without express written approval of
Globaltech Semiconductor.
CONTACT US
GS Headquarter
4F.,No.43-1,Lane11,Sec.6,Minquan E.Rd Neihu District Taipei City 114, Taiwan (R.O.C)
886-2-2657-9980
886-2-2657-3630
sales_twn@gs-power.com
Wu-Xi Branch
No.21 Changjiang Rd., WND, Wuxi, Jiangsu, China (INFO. &. TECH. Science Park Building A 210 Room)
86-510-85217051
86-510-85211238
sales_cn@gs-power.com
RD Division
824 Bolton Drive Milpitas. CA. 95035
1-408-457-0587
Version_1.0
Notice