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Data Sheet
PT7M8202
LDO Regulator
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Description
The PT7M8202 series are highly accurate, low dropout
voltage regulators with low noise, high ripple rejection
and low current consumption for portable RF and
wireless applications.
The PT7M8202 includes a reference voltage source, an
error amplifier, a driver transistor, a current limit
protection，a thermal protection and an internal phase
compensator.
A noise bypass pin is available for further reduction of
output noise.
The output voltage for the regulator is set by factory
trimming within a range of 1.2V to 3.3V in 100mV step
includes 2.85V. The PT7M8202 series are stable with
low ESR ceramic capacitors.
Output Current 300mA or more
Ultra-Low-Noise for RF Application:
30µV
RMS
@1.2V
Quick Start-Up (Typically 50µs)
Dropout Voltage: 270mV@300mA for 3.3V
Wide Operating Voltage Range: 1.8V to 5.5V
Output Voltage Range: 1.2V to 3.3V(100 mV Step)
Standby Current: 0.1µA
High Ripple Rejection: 80dB@1kHz
Output Current-Limit Protection
Thermal Shutdown Protection
Operating Temperature Range: -40℃~+85℃
Low ESR Capacitor compatible: Ceramic capacitor
Lead Free and Green Package: SOT23-5L, SC70-5L,
TDFN-6L 1.8
×
2
Application
•
•
•
•
•
•
Mobile phones (PDC, GSM, CDMA, IMT2000 etc.)
Cordless phones and radio communication
Digital still cameras and video cameras
PDAs
MP3 players
Portable devices
Ordering Information
Part Number
PT7M8202①②③TA5E
PT7M8202①②③C5E
PT7M8202①②③ZE6E
Package
Lead free and Green
SOT23-5L
Lead free and Green
SC70-5L
Lead free and Green
TDFN-6L
Note:
“①②③” 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
Regulator Output
12-33, 2A
voltage
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
PT0338 (11/09)
Description
Low active
High active
Internally set sequential number relating output voltage of
regulator , the detail is in Table 2
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
Ver: 0
1
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Data Sheet
PT7M8202
LDO Regulator
Block Diagram
VOUT
Over-current/Over
Ov
er-current
Temperature
Protection Circuit
Protection Circuit
EN
ON/OFF
ON/OF
F
Circuit
Circuit
Quick
Start
Quick
Start
VIN
Reference
Reference
Voltage Circuit
Voltage Circuit
GND
BP
Pin Assignment
VIN
GND
EN
1
2
3
4
SC70-5L/SOT23-5L
BP
5
VOUT
VIN
NC
VOUT
1
2
3
6
5
4
TDFN-6L 1.8x2
EN
GND
BP
Pin Description
Pin No. for
SOT23-5L/SC70-5L
1
2
3
4
5
-
TDFN-6L
1
5
6
4
3
2
I/O
I
P
I
-
O
-
Name
VIN
GND
EN
BP
VOUT
NC
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.
Reference Noise Bypass.
Output of Regulator. Bypass with a 1µF ceramic
capacitor (X5R/X7R) to GND.
No Connection.
PT0338 (11/09)
2
Ver: 0
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Data Sheet
PT7M8202
LDO Regulator
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 Protections
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.
Bypass Capacitor and Low Noise
A 22nF between the BP pin and GND pin significantly reduces noise on the regulator output, it is critical that the capacitor
connection between the BP pin and GND pin be direct and PCB traces should be as short as possible. There is a relation ship
between the bypass capacitor value and the LDO regulator turn on time. DC leakage on this pin can affect the LDO regulator
output noise and voltage regulation performance.
EN Pin
The output of the regulator in PT7M8202A/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.
PT0338 (11/09)
3
Ver: 0
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Data Sheet
PT7M8202
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 …………………………………………700mA
Power Dissipation………………………………………...SOT23/400mW
SC70/300mW
TDFN/600mW
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℃, Bypass capacitor=22nF)
Parameter
Output Voltage
Maximum Output
Current
Dropout Voltage
Supply Current
Standby Current
Line Regulation
Load Regulation
Input Voltage
Output Voltage
Temperature
Characteristic
Ripple Rejection
Current Limit
Thermal Shutdown
Thermal Shutdown
Hysteresis
EN”High”Voltage
EN”Low”Voltage
EN”High”Current
EN”Low” Current
Output Discharge
Resistance
Output Noise
Voltage
Symbol
V
OUT(E) *2
I
OUTMAX
Vdif
*3
I
SS
I
SB
∆V
OUT
/
∆V
IN
*V
OUT
∆V
OUT2
V
IN
∆V
OUT
/
∆Topr*V
OUT
PSRR
I
LIM
T
SD
∆T
SD
V
ENH
V
ENL
I
ENH
I
ENL
Rdis
e
ON
-
-
V
IN
=V
OUT(S)
+1.0V
V
IN
= V
OUT(S)
+1.0V, EN=OFF
V
IN
= V
OUT(S)
+1.0V
EN=OFF
V
OUT
=1.2V，10Hz to 100kHz, I
OUT
=30mA,
C
OUT
=1µF
1.5
-
-0.10
-0.10
-
-
Conditions
V
IN
=V
OUT(S) *1
+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
≤300mA
-
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
-
-
-
-
+/-100
80
450
170
40
-
-
-
-
200
30
-
0.3
0.10
0.10
-
-
Typ.
V
OUT(S)
-
0.59
0.49
0.36
0.31
Max.
V
OUT(S)
*1.02
-
-
-
-
-
100
1
0.2
0.6
5.5
-
-
-
Unit
V
mA
V
µA
µA
%/V
%
V
ppm/℃
dB
mA
℃
V
µA
Ω
µV
RMS
70
0.1
0.05
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
PT0338 (11/09)
4
Ver: 0
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Data Sheet
PT7M8202
LDO Regulator
Application Circuit
Power Input
VIN
VOUT
LDO OUTPUT
Cout
ON/OFFInput
EN
Cin
GND
Single GND
BP
Cbp
Note: Cin=Cout=1µF, Cbp=22nF
Typical Performance Characteristics
1. Output Voltage vs. Output Current
PT7M8202 (1.2V)
Cin=1µF(Ceramics), Cout=1µF(Ceramics)
1.5
3.0
2.5
1.0
Vo (V)
Vo (V)
Vin=2.5V
0.5
Vin=3.5V
Vin=5.5V
2.0
1.5
1.0
0.5
0.0
0
100
200
300
Io (mA)
400
500
600
0
100
200
300
400
500
600
700
Io (mA)
Vin=4.5V
Vin=5.5V
PT7M8202 (3.3V)
Cin=1µF(Ceramics), Cout=1µF(Ceramics)
0.0
PT0338 (11/09)
5
Ver: 0
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