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Data Sheet
PT7M8201
LDO Regulator
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Description
The PT7M8201 series are highly accurate, low dropout
voltage regulators with low noise, high ripple rejection
and low current consumption.
The PT7M8201 includes a reference voltage source, an
error amplifier, a driver transistor, a current limit
protection, a thermal protection and an internal phase
compensator.
The output voltage for the regulator is set by factory
trimming within a range of 1.2V to 3.3V in 100mV step.
The PT7M8201 series are stable with low ESR ceramic
capacitors.
Output Current 300mA or more
Dropout Voltage: 70mV@100mA
Operating Voltage Range: 1.8V---5.5V
Output Voltage Range: 1.2V to 3.3V(100 mV Step)
Highly Accurate:
±2.0%
Low Power Consumption: 50µA
Standby Current: 0.1µA
High Ripple Rejection: 75dB@1kHZ
Output Current-Limit Protection
Thermal Shutdown Protection
Operating Temperature Range: -40℃~+85℃
Low ESR Capacitor compatible: Ceramic capacitor
Lead Free Package: SOT23-3L, SOT23-5L, SOT89-
3L, SOT89-5L
Ordering Information
Application
•
•
•
•
•
•
Part Number
PT7M8201②③TA3E
PT7M8201①②③TA5E
PT7M8201②③④TD3E
PT7M8201①②③TD5E
Mobile phones (PDC, GSM, CDMA, IMT2000 etc.)
Cordless phones and radio communication
Digital still cameras and video cameras
PDAs
MP3 players
Portable devices
Package
Lead free and Green
SOT23-3L
Lead free and Green
SOT23-5L
Lead free and Green
SOT89-3L
Lead free and Green
SOT89-5L
Note:
“①②③④” refer to different functions. See below
Table 1 and Table 2.
Table 1 Option Definition Table
Designator
Symbol
①
A
Regulators EN type
B
②③
④
12-33, 2A
A, B, C
Description
Low active
High active
Internally set sequential number relating output voltage of
regulator , the detail is in Table 2
Pin Assignment Option, A: default option, B, C: variation
Table 2 Definition of designator
Designator
VOUT (V)
②③
12
1.2
13
1.3
14
1.4
15
1.5
16
1.6
17
1.7
18
1.8
19
1.9
Designator
②③
20
21
22
23
24
25
26
27
VOUT (V)
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Designator
②③
28
29
30
31
32
33
2A
VOUT (V)
2.8
2.9
3.0
3.1
3.2
3.3
2.85
PT0331 (08/09)
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Ver: 0
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Data Sheet
PT7M8201
LDO Regulator
Block Diagram
VOUT
Over-current/over-
temperature
Protection Circuit
EN
ON/OF
F
Circuit
VIN
Reference
Voltage Circuit
GND
Pin Assignment
VIN
GND
EN
1
2
3
SOT23-5L
Pin Description for SOT23-5, SOT89-5L
Pin No for
Pin No for
SOT23-5L
SOT89-5L
1
2
3
4
5
4
2
1
3
5
4
NC
5
VOUT
EN
GND
NC
1
2
3
SOT89-5L
4
VIN
5
VOUT
I/O
I
P
I
NC
O
Name
VIN
GND
EN
NC
VOUT
Descriptions
Regulator Supply Input. Supply voltage can range
from 1.8V to 5.5V. Bypass with a 1µF ceramic
capacitor (X5R/X7R) to GND.
Ground.
ON/OFF Control of Regulator.
-
Output of Regulator. Bypass with a 1µF ceramic
capacitor (X5R/X7R) to GND.
PT0331 (08/09)
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Ver: 0
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Data Sheet
PT7M8201
LDO Regulator
GND
1
3
VIN
GND
VIN
VOUT
SOT23-3L
1
2
3
SOT89-3L (A)
VOUT
GND
VIN
1
2
3
SOT89-3L (C)
VOUT
2
Pin Description for SOT89-3L and SOT23-3L
Pin No for
Pin No for
I/O
Name
SOT23-3
SOT89-3A(C)
1
1 (2)
I
GND
2
3
3 (1)
2 (3)
O
I
VOUT
VIN
Descriptions
GND
Output of Regulator. Bypass with a 1µF ceramic capacitor
(X5R/X7R) to GND
Regulator Supply Input. Supply voltage can range from 1.8V to
5.5V. Bypass with a 1µF ceramic capacitor (X5R/X7R) to GND.
Functional Description
(Refer to Block Diagram)
Output Voltage
The divided output voltage is compared with the internal reference voltage by the error amplifier with internal phase compensator.
The output of the error amplifier then drives the P-channel MOSFET to maintain a stable and constant output voltage.
Low ESR Capacitors
The internal phase compensator maintains the stable output voltage with low ESR ceramic input and output capacitors. 1µF low
ESR (X5R/X7R) ceramic capacitor located as close as possible to the IC’s pins is recommended.
Current Limit and Thermal Shutdown Protection
Current limit protection is used to limit the output current when an overload condition occurs. As a result, the output voltage will
drop. Thermal shutdown protection will turn off the output to reduce the power dissipation when the operation junction
temperature exceeds 170°C.
EN Pin
The output of the regulator in PT7M8201A/B can be controlled with EN pin. The EN pin should be connected to a “VIN” or a
“GND” voltage as a floating input applied to inverter input of the enable circuitry will increase the current consumption.
NOTE ON USE
Please use this IC within the stated absolute maximum ratings.
Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on output current.
Please keep the resistance low between VIN and GND wiring in particular.
Please wire the input capacitor (Cin) and the output capacitor (Cout) as close to the IC as possible.
1.
2.
3.
PT0331 (08/09)
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Ver: 0
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Data Sheet
PT7M8201
LDO Regulator
Maximum Ratings
Storage Temperature………………………………….. -55℃ to +125℃
Ambient Temperature with Power Applied......................-40℃ to +85℃
Input Voltage………………………………………….……..……+6.0V
Output Voltage …………………………………….....-0.3 to V
CC
+0.3V
EN pin Voltage…………………………………………………… +6.0V
DC Input/Output Current ………………………………………700mAV
Power Dissipation……………………………………….SOT23/400mW
SOT89/550mW
Note: For different package, the power dissipation is not same.
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended Operating Conditions
Symbol
V
CC
T
A
Parameter
Operating Voltage
Operating temperature
Min.
1.8
-40
Typ.
-
25
Max.
5.5
85
Unit
V
°C
Electrical Characteristics
(T
A
=25℃)
Parameter
Output Voltage
Maximum Output
Current
Dropout voltage
Supply Current
Standby current
Line regulation
Load regulation
Input voltage
Output Voltage
Temperature
Characteristic
Ripple Rejection
Symbol
V
OUT(E) *1
I
OUTMAX
Vdif
*3
I
SS
I
SB
∆V
OUT
/
∆V
IN
*V
OUT
∆V
OUT2
V
IN
∆V
OUT
/
∆Topr*V
OUT
PSRR
Conditions
V
IN
=V
OUT(S) *2
+1.0V, I
OUT
=30mA
V
IN
=V
OUT(S)
+1.0V
1.7V≤V
OUT(S)
≤1.8V
1.9V≤V
OUT(S)
≤2.3V
I
OUT
= 300mA
2.4V≤V
OUT(S)
≤2.7V
2.8V≤V
OUT(S)
≤3.3V
V
IN
= V
OUT(S)
+1.0V, no load
V
IN
= V
OUT(S)
+1.0V
EN=OFF
V
OUT(S)
+1.0V≤V
IN
≤5.5V
I
OUT
=30 mA
V
IN
= V
OUT(S)
+1.0V,
1.0mA≤I
OUT
≤100mA
-
I
OUT
=30 mA
-40℃≤Topr≤85℃
V
IN
=[V
OUT(S)
+1.0]V
DC
+1Vp-p AC
V
OUT
=1.5V, I
OUT
=30mA, f=1kHz
V
OUT
= V
OUT(S)
*0.9
-
Min.
V
OUT(S)
*0.98
300
-
-
-
-
-
-
-
-
1.8
-
-
Typ.
V
OUT(S)
-
0.28
0.25
0.22
0.19
Max.
V
OUT(S)
*1.02
-
0.42
0.38
0.33
0.29
Unit
V
mA
V
µA
µA
%/V
mV
V
ppm/℃
dB
mA
℃
V
µA
k
Ω
50
0.1
0.05
8
-
+/-100
75
85
1
0.2
20
5.5
-
-
Current limit
I
LIM
400
450
600
-
170
-
Thermal shutdown
TSD
Thermal Shutdown
-
40
-
∆TSD
-
Hysteresis
EN”High”Voltage
V
ENH
-
1.5
-
-
EN”Low”Voltage
V
ENL
-
-
-
0.3
EN”High”Current
I
ENH
V
IN
=V
OUT(T)
+1.0V
-0.10
-
0.10
EN”Low” Current
I
ENL
V
IN
= V
OUT(T)
+1.0V, EN=OFF
-0.10
-
0.10
V
IN
= V
OUT(S)
+1.0V,
Output Discharge
Rdis
-
1
-
Resistance
EN=OFF
Note:
*1: V
OUT(S)
=Specified output voltage.
*2: V
OUT(E)
=Effective output voltage.
(I.e. the output voltage when "V
OUT(S)
+1.0V" is provided at the VIN pin while maintaining a certain I
OUT
value).
*3: Vdif={V
IN1(*5)
-V
OUT1(*4)
}.
*4: V
OUT1
=A voltage equal to 98% of the output voltage whenever an amply stabilized I
OUT
{V
OUT(S)
+1.0V} is input.
*5: V
IN1
=The input voltage when V
OUT1
appears as input voltage is gradually decreased.
*6: Unless otherwise stated, V
IN
=V
OUT(S)
+1.0V
PT0331 (08/09)
4
Ver: 0
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Data Sheet
PT7M8201
LDO Regulator
Application Circuit
Power Input
VIN
VOUT
LDO OUTPUT
ON/OFF Input
EN
Ci n
GND
Single GND
Cout
Typical Performance Characteristics
1. Output Voltage vs. Output Current
PT7M8201 (1.8V)
Cin=1µF(Ceramics), Cout=1µF(Ceramics)
2.0
1.6
Vo (V)
1.2
0.8
0.4
0.0
0
100
200
300
400
Io (mA)
500
600
Vin=2.5V
Vin=3.5V
Vin=4.5V
Vin=5.5V
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
100
200
300
400
500
600
700
Io (mA)
Vin=3.5V
Vin=4.5V
Vin=5.5V
PT7M8201 (2.8V)
Cin=1µF(Ceramics), Cout=1µF(Ceramics)
PT0331 (08/09)
5
Vo (V)
Ver: 0
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