GMT G924-120T1UF

G924
Global Mixed-mode Technology Inc.
300mA Low-Noise LDO Regulators
Features
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General Description
Low, 90µA No-Load Supply Current
Guaranteed 300mA Output Current
Dropout Voltage is 200mV @ 150mA Load
PSRR=53dB @ 1kHz
Over-Temperature Protection and Short-Circuit
Protection
Max. Supply Current in Shutdown Mode < 1µA
Low Output Noise at 28µVRMS
Stable with low cost ceramic capacitors
Output voltage: 1.20V~5.00V
The G924 is a low supply current, low dropout linear
regulator that comes in a space saving SOT-23-5
package. The supply current at no-load is 90µA. In the
shutdown mode, the maximum supply current is less
than 1µA. Operating voltage range of the G924 is from
2.5V to 5.5V. The over-current protection limit is set at
550mA typical and 400mA minimum. An over-temperature protection circuit is built-in in the G924 to
prevent thermal overload. These power saving
features make the G924 ideal for use in the batterypowered applications such as notebook computers,
cellular phones, and PDA’s.
Applications
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Notebook Computers
Cellular Phones
PDAs
Digital still Camera and Video Recorders
Hand-Held Devices
Audio Codec
Pin Configuration
SHDN
GND
1
2
Typical Application Circuit
5
VIN
VIN
+C
G924
BATTERY
G924
IN
_ 1µF
4
3
BYP
OUT
SOT-23-5
COUT
1µF
SHDN
GND
BYP
OUTPUT
VOLTAGE
OUT
CBYP
10nF
Fixed mode
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.2 Preliminary
Oct 01, 2004
1
G924
Global Mixed-mode Technology Inc.
Ordering Information
ORDER
NUMBER
ORDER NUMBER
(Pb free)
MARKING
VOLTAGE
TEMP.
RANGE
PACKAGE
G924-330T1U
G924-330T1Uf
94AXx
3.30V
-40°C~ +85°C
SOT-23-5
For other output voltage, please contact us at [email protected]
Note: T1: SOT-23-5
U: Tape & Reel
Selector Guide
ORDER NUMBER
ORDER NUMBER
(Pb free)
OUTPUT VOLTAGE (V)
MARKING
G924-120T1U
G924-130T1U
G924-140T1U
G924-150T1U
G924-160T1U
G924-170T1U
G924-180T1U
G924-190T1U
G924-200T1U
G924-210T1U
G924-220T1U
G924-230T1U
G924-240T1U
G924-250T1U
G924-260T1U
G924-270T1U
G924-280T1U
G924-285T1U
G924-290T1U
G924-300T1U
G924-310T1U
G924-315T1U
G924-320T1U
G924-330T1U
G924-340T1U
G924-350T1U
G924-360T1U
G924-370T1U
G924-380T1U
G924-390T1U
G924-400T1U
G924-410T1U
G924-420T1U
G924-430T1U
G924-440T1U
G924-450T1U
G924-460T1U
G924-470T1U
G924-475T1U
G924-480T1U
G924-490T1U
G924-500T1U
G924-120T1Uf
G924-130T1Uf
G924-140T1Uf
G924-150T1Uf
G924-160T1Uf
G924-170T1Uf
G924-180T1Uf
G924-190T1Uf
G924-200T1Uf
G924-210T1Uf
G924-220T1Uf
G924-230T1Uf
G924-240T1Uf
G924-250T1Uf
G924-260T1Uf
G924-270T1Uf
G924-280T1Uf
G924-285T1Uf
G924-290T1Uf
G924-300T1Uf
G924-310T1Uf
G924-315T1Uf
G924-320T1Uf
G924-330T1Uf
G924-340T1Uf
G924-350T1Uf
G924-360T1Uf
G924-370T1Uf
G924-380T1Uf
G924-390T1Uf
G924-400T1Uf
G924-410T1Uf
G924-420T1Uf
G924-430T1Uf
G924-440T1Uf
G924-450T1Uf
G924-460T1Uf
G924-470T1Uf
G924-475T1Uf
G924-480T1Uf
G924-490T1Uf
G924-500T1Uf
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
2.70
2.80
2.85
2.90
3.00
3.10
3.15
3.20
3.30
3.40
3.50
3.60
3.70
3.80
3.90
4.00
4.10
4.20
4.30
4.40
4.50
4.60
4.70
4.75
4.80
4.90
5.00
94AAx
94ABx
94ACx
94ADx
94AEx
94AFx
94AGx
94AHx
94AIx
94AJx
94AKx
94ALx
94AMx
94ANx
94AOx
94APx
94AQx
94ARx
94ASx
94ATx
94AUx
94AVx
94AWx
94AXx
94AYx
94AZx
94BAx
94BBx
94BCx
94BDx
94BEx
94BFx
94BGx
94BHx
94BIx
94BJx
94BKx
94BLx
94BMx
94BNx
94BOx
94BPx
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.2 Preliminary
Oct 01, 2004
2
G924
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Operating Temperature Range…….....-40°C to +85°C
Junction Temperature………………...………+150°C
θ JA (1) ….…..…………….……….…..…..240°C/Watt
Storage Temperature Range……….-65°C to +150°C
Reflow Temperature (soldering, 10sec)…..…….260°C
VIN to GND.………………………………-0.3V to +6.5V
Output Short-Circuit Duration…….….……….…Infinite
SHDN to GND……..………....….….-0.3V to VIN+0.3V
OUT to GND………………………-0.3V to (VIN + 0.3V)
Continuous Power Dissipation (TA = +25°C)
SOT-23-5………..…………..……….……….…520mW
Note (1): See Recommended Minimum Footprint
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings
only, and 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 affect device reliability.
Electrical Characteristics
(VIN =5V, V SHDN =VIN, TA =TJ =25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Voltage (Note 2)
Output Voltage Accuracy
SYMBOL
CONDITION
VIN
VOUT
MIN TYP MAX UNIT
2.5
---
5.5
VOUT≥2.50V, IOUT=1mA
-2
---
2
2.50V>VOUT≥1.80V, IOUT=1mA
-3
---
3
1.80V>VOUT≥1.20V, IOUT=1mA
-4
---
4
Maximum Output Current
V
%
300
---
---
mA
Current Limit (Note 3)
ILIM
400
550
---
mA
Short Circuit Current
Isc
---
280
---
mA
Ground Pin Current
IQ
µA
Dropout Voltage (Note 4)
VDROP
IOUT =300mA
---
90
---
VOUT=1.50V
VOUT=1.80V
VOUT=2.50V
-------
1.36
1.10
0.58
-------
VOUT=3.00V
---
0.41
---
VOUT=3.30V
VOUT=4.75V
-----
0.36
0.25
-----
VOUT=5.00V
---
0.24
---
V
Line Regulation
∆VLNR
VIN=VOUT+0.1V,to 5.5V IOUT=10mA
---
0.06
---
%/V
Load Regulation
∆VLDR
IOUT = 10mA to 300mA
---
0.02
---
%/mA
Ripple Rejection
Output Voltage Noise
(10Hz to 100kHz)
PSRR
F=1kHz, 0.45VP-P, IOUT=10mA
---
53
---
dB
en
COUT = 1µF, IOUT = 1mA, CBYP = 10nF
---
28
---
µVRMS
VIH
Regulator enabled
1.5
---
---
VIL
Regulator shutdown
---
---
0.4
SHUTDOWN
SHDN Input Threshold
V
SHDN Input Bias Current
I SHDN
V SHDN = VIN
TA = +25°C
---
0.003
1
µA
Shutdown Supply Current
IQSHDN
VOUT = 0V
TA = +25°C
---
0.2
1
µA
TSHDN
---
145
---
°C
∆TSHDN
---
25
---
°C
THERMAL PROTECTION
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Note 1: Limits is 100% production tested at TA= +25°C. Low duty pulse techniques are used during test to
maintain junction temperature as close to ambient as possible.
Note 2: Guaranteed by line regulation test.
Note 3: Not tested. For design purposes, the current limit should be considered 400mA minimum.
Note 4: The dropout voltage is defined as (VIN-VOUT) when VOUT is 100mV below the target value of VOUT. The performance of every G924 part, see “Typical Performance Characteristics”.
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
3
G924
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(VIN =5V, CIN=1µF, COUT=1µF, V SHDN = VIN, G924-475, TA =25°C, unless otherwise noted.)
Line Transient
Load Transient
Short Circuit Current
Ripple Rejection
70
100mA
60
PSRR (dB)
50
300mA
30
20
10
0
0.01
Turn-ON
200mA
40
VIN=6V ;
CIN=1µF ; COUT=1µF
CBYP=10nF ; Vr=224mv
0.1
1
10
Frequency (KHz)
100
Turn-OFF
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
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G924
Global Mixed-mode Technology Inc.
Typical Performance Characteristics (continued)
Dropout Voltage vs. IL
Overcurrent Protection Characteristics
300
Dropout Voltage (mV)
250
200
TA=85°C
150
TA=25°C
100
TA=-25°C
50
0
0
50
100
Output Voltage vs. Temperature
150
IL (mA)
200
250
300
Output Noise
5.2
5.1
IL=10mA
Output Voltage (V)
5.0
4.9
VIN=5.5V
4.8
4.7
4.6
VIN=5.0V
4.5
4.4
4.3
4.2
-25 -15 -5
5
15 25 35 45 55 65 75 85
Temperature (°C)
Safe Operating Area
[Power Dissipation Limit]
Max. Power Dissipation vs. Temperature
0.7
400
Maximum Recommended Output Current
300
250
TA=85°C
200
TA=55°C
TA=25°C
150
100
1oz Copper on SOT-23-5 Package
Mounted on recommended mimimum
footprint (RθJA=240°C/W)
50
Still Air
1oz Copper on SOT-23-5 Package
Mounted on recommended mimimum
footprint (RθJA=240°C/W)
0.6
Still air
Power Dissipation (W)
Output Current (mA)
350
0.5
0.4
0.3
0.2
0.1
0
0
0.1
0.4
0.7
1.0
1.3
1.6
1.9
25
2.2
35
45
55
65
75
85
95 105 115 125
Amibent Temperature TA (°C)
Input-Output Voltage Differential VIN-VOUT (V)
Note: VIN(max) <= 5.5V
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
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G924
Global Mixed-mode Technology Inc.
Pin Description
PIN
NAME
FUNCTION
1
SHDN
Active-High Enable Input. A logic low reduces the supply current to less than 1µA. Connect to IN for
normal operation.
2
GND
Ground. This pin also functions as a heat sink. Solder to large pads or the circuit board ground
plane to maximize thermal dissipation.
3
BYP
This is a reference bypass pin. It should connect external 10nF capacitor to GND to reduce output
noise. Bypass capacitor must be no less than 1nF. (CBYP≥ 1nF)
4
OUT
Regulator Output. Sources up to 300mA. Bypass with a 1µF capacitor to GND.
5
VIN
Regulator Input. Supply voltage can range from +2.5V to +5.5V. Bypass with 1µF to GND.
Detailed Description
1.20V, the error amplifier causes the output PMOS to
conduct more current to pull the feedback voltage up
to 1.20V. Thus, through this feedback action, the error
amplifier, output PMOS, and the voltage dividers effectively form a unity-gain amplifier with the feedback
voltage force to be the same as the 1.20V bandgap
reference. The output voltage, VOUT, is then given by
the following equation:
The block diagram of the G924 is shown in Figure 1. It
consists of an error amplifier, 1.20V bandgap reference, PMOS output transistor, internal feedback
voltage divider, shutdown logic, over current protection
circuit, and over temperature protection circuit.
The internal feedback voltage divider’s central tap is
connected to the non-inverting input of the error amplifier. The error amplifier compares non-inverting input
with the 1.20V bandgap reference. If the feedback
voltage is higher than 1.20V, the error amplifier’s output becomes higher so that the PMOS output transistor has a smaller gate-to-source voltage (VGS). This
reduces the current carrying capability of the PMOS
output transistor, as a result the output voltage decreases until the feedback voltage is equal to 1.20V.
Similarly, when the feedback voltage is less than
VOUT = 1.20 (1 + R1/R2).
(1)
Alternatively, the relationship between R1 and R2 is
given by:
R1 = R2 (VOUT / 1.20 - 1).
(2)
For the output voltage versions of G924, the output
voltages are 1.20V for G924-120, 2.50V for G924-250,
3.30V for G924-330, etc.
VIN
SHDN
-
OVER CURRENT
PROTECT & DYNAMIC
FEEDBACK
ERROR
AMP
SHUTDOWN
LOGIC
+
OUT
BYP
R1
OVER TEMP.
PROTECT
CBYP
1.2V
Vref
R2
GND
Figure 1. Functional Diagram
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
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G924
Global Mixed-mode Technology Inc.
Over Current Protection
The G924 uses a current mirror to monitor the output
current. A small portion of the PMOS output transistor’s current is mirrored onto a resistor such that the
voltage across this resistor is proportional to the output
current. This voltage is compared against the 1.20V
reference. Once the output current exceeds the limit,
the PMOS output transistor is turned off. Once the
output transistor is turned off, the current monitoring
voltage decreases to zero, and the output PMOS is
turned on again. If the over current condition persist,
the over current protection circuit will be triggered
again. Thus, when the output is shorted to ground, the
output current will be alternating between 0 and the
over current limit. The typical over current limit of the
G924 is set to 550mA. Note that the input bypass capacitor of 1µF must be used in this case to filter out
the input voltage spike caused by the surge current
due to the inductive effect of the package pin and the
printed circuit board’s routing wire. Otherwise, the actual voltage at the IN pin may exceed the absolute
maximum rating.
Refer to “Safe Operating Area” of the Typical Performance Characteristics is the G924 valid operating
region & refer to “Maximum Power Dissipation vs.
Temperature” is the maximum power dissipation of
SOT-23-5.
Over Temperature Protection
To prevent abnormal temperature from occurring, the
G924 has a built-in temperature monitoring circuit.
When it detects the temperature is above 145oC, the
output transistor is turned off. When the IC is cooled
down to below 120oC, the output is turned on again. In
this way, the G924 will be protected against abnormal
junction temperature during operation.
Power-Supply Rejection and Operation from
Sources Other than Batteries
The G924 is designed to deliver low dropout voltages
and low quiescent currents in battery powered systems. Power-supply rejection is 53dB at low frequencies as the frequency increases above 20kHz; the
output capacitor is the major contributor to the rejection of power-supply noise.
Shutdown Mode
When the SHDN pin is connected a logic low voltage,
the G924 enters shutdown mode. All the analog circuits are turned off completely, which reduces the
current consumption to only the leakage current. The
output is disconnected from the input. When the output
has no load at all, the output voltage will be discharged to ground through the internal resistor voltage
divider.
When operating from sources other than batteries,
improve supply-noise rejection and transient response
by increasing the values of the input and output capacitors, and using passive filtering techniques.
The die attachment area of the G924’s lead frame is
connected to pin 2, which is the GND pin. Therefore,
the GND pin of G924 can carry away the heat of the
G924 die very effectively. To improve the power dissipation, connect the GND pin to ground using a large
ground plane near the GND pin.
Applications Information
Capacitor Selection and Regulator Stability
Normally, use a 1µF capacitor on the input and a 1µF
capacitor on the output of the G924. Larger input capacitor values and lower ESR provide better supply-noise rejection and transient response. A highervalue input capacitor (10µF) may be necessary if large,
fast transients are anticipated and the device is located several inches from the power source.
Load Transient Considerations
The G924 load-transient response graphs show two
components of the output response: a DC shift of the
output voltage due to the different load currents, and
the transient response. Typical overshoot for step
changes in the load current from 10mA to 300mA is
30mV. Increasing the output capacitor's value and
decreasing its ESR attenuates transient spikes.
Operating Region and Power Dissipation
Since the G924 is a linear regulator, its power dissipation is always given by P = IOUT (VIN – VOUT). The
maximum power dissipation is given by:
Input-Output (Dropout) Voltage
A regulator's minimum input-output voltage differential
(or dropout voltage) determines the lowest usable
supply voltage. In battery-powered systems, this will
determine the useful end-of-life battery voltage. Because the G924 use a P-channel MOSFET pass transistor, their dropout voltage is a function of RDS(ON)
multiplied by the load current cause the G924 use a
P-channel MOSFET pass transistor, their dropout
voltage is a function of RDS(ON) multiplied by the load
current.
PDMAX = (TJ – TA)/θJA = (150-25) / 240 = 520mW
Where (TJ – TA) is the temperature difference the
G924 die and the ambient air, θJA, is the thermal resistance of the chosen package to the ambient air. For
surface mount device, heat sinking is accomplished by
using the heat spreading capabilities of the PC board
and its copper traces. In the case of a SOT-23-5
package, the thermal resistance is typically
240oC/Watt. (See Recommended Minimum Footprint).
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
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Global Mixed-mode Technology Inc.
Layout Guide
G924
ing wire. Otherwise, the actual voltage at the IN pin
may exceed the absolute maximum rating.
The output capacitor also must be located a distance
of not more than 1cm from output to a clean analog
ground. Because it can filter out the output spike
caused by the surge current due to the inductive effect
of the package pin and the printed circuit board’s routing wire.
An input capacitance of 1µF is required between the
G924 input pin and ground (the amount of the capacitance may be increased without limit), This capacitor
must be located a distance of not more than 1cm from
the input and return to a clean analog ground.
Input capacitor can filter out the input voltage spike
caused by the surge current due to the inductive effect
of the package pin and the printed circuit board’s rout-
Recommend Minimum Footprint
SOT-23-5
TEL: 886-3-5788833
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Ver: 0.2 Preliminary
Oct 01, 2004
8
G924
Global Mixed-mode Technology Inc.
Package Information
C
D
L
E
H
θ1
e1
e
A
A2
A1
b
Note:
1. Package body sizes exclude mold flash protrusions or gate burrs
2. Tolerance ±0.1000 mm (4mil) unless otherwise specified
3. Coplanarity: 0.1000mm
4. Dimension L is measured in gage plane
SYMBOLS
MIN
DIMENSIONS IN MILLIMETERS
NOM
MAX
A
1.00
1.10
1.30
A1
A2
0.00
0.70
----0.80
0.10
0.90
b
C
0.35
0.10
0.40
0.15
0.50
0.25
D
E
2.70
1.40
2.90
1.60
3.10
1.80
e
e1
H
--------2.60
1.90(TYP)
0.95
2.80
--------3.00
L
θ1
0.37
------
-----
1º
5º
9º
Taping Specification
PACKAGE
Q’TY/REEL
SOT-23-5
3,000 ea
Feed Direction
SOT-23-5 Package Orientation
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.2 Preliminary
Oct 01, 2004
9