PT5128E23F-H.pdf 데이터시트 (총 9 페이지) - 파일 다운로드 PT5128E23F-H 데이타시트 다운로드

No Preview Available !

PT5128
Dual, High PSRR, 200mA Low Dropout Regulator
GENERAL DESCRIPTION
The PT5128 is a dual channel low-dropout voltage regulator designed for portable and wireless applications that
require high PSRR, low quiescent current and excellent line and load transient response. The PT5128 is stable with a
small 1µF ceramic capacitor on the output. With its better than 75dB PSRR at 1kHz, the PT5128 is ideal for battery
powered systems to deliver low dropout voltage and low quiescent current.
This device can be used for mobile phone and similar battery powered wireless applications. It provides up to 200mA at each
channel, from a 2.5V to 5.5V input. The PT5128 consumes less than 0.1µA in shutdown mode. The PT5128 is available in 6 pin
SOT23 package. The output voltage is available at 1.5V, 1.8V, 2.5V, 2.8V, 3.0V and 3.3V.
FEATURES
APPLICATIONS
z -40°C to +85°C junction temperature for operation
z CDMA/GSM mobile phones
z 2.5V to 5.5V input range
z Cordless telephones
z 200mA guaranteed output current (Each LDO)
z WLAN and Bluetooth appliances
z 62dB PSRR @1KHz, VIN = VOUT + 1V
58dB PSRR @10KHz, VIN = VOUT + 1V
z Low quiescent current: 60uA (Typ.)
z PDAs/MP3
z Battery powered portable devices
z 180mV maximum dropout voltage with 100mA load
z < 1uA quiescent current at shutdown mode
z Fast turn on time: 72us (typical)
z Thermal shutdown and short-circuit current limit
z 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V typical output
standard
z Miniature SOT-23-6 package
TYPICAL APPLICATIONS*
VIN
CIN
1uF
VIN
VEN1
VEN2
GND
VOUT1
VOUT2
VOUT1
COUT1
1uF
VOUT2
COUT2
1uF
*Note
COUT1, COUT2: Recommended ceramic capacitor
KEY PERFORMANCE
Ripple Rejection vs Frequency
-35
-40
VIN(DC) = 3.8V
VIN(AC) = 200mV
-45
VOUT = 2.8V
COUT = 1uF
-50
-55
-60
-65
-70
-75
100
1K 10K
Frequency (Hz)
10K
ORDERING INFORMATION*
Package
Temperature
Range
Channel-1
Output
Voltage (V)
Channel-2
Output
Voltage (V)
Part Number
Standard Parts
SOT-23-6 -40to 85
2.8
2.8
2.8 2.5
2.8 1.8
2.5 2.5
2.5 1.8
3.3 2.5
3.3 1.8
* All parts are supplied as 3000 units, tape and reel.
PT5128E23F-A
PT5128E23F-D
PT5128E23F-E
PT5128E23F-F
PT5128E23F-G
PT5128E23F-H
PT5128E23F-I
www.micro-bridge.com
Package
Temperature
Range
Non-Standard Parts
SOT-23-6 -40to 85
Channel-1
Output
Voltage (V)
Channel-2
Output
Voltage (V)
Part Number
3.0 3.0 PT5128E23F-B
2.8 3.0 PT5128E23F-C
3.0 2.5 PT5128E23F-J
3.0 1.8 PT5128E23F-K
1.8 1.5 PT5128E23F-M
3.0 3.0 PT5128E23F-B
2.8 3.0 PT5128E23F-C
Page 1

No Preview Available !

PIN ASSIGNMENT
VOUT1
6
VIN VEN1
54
PT5128
1
VOUT2
2
GND
SOT23-6
3
VEN2
PT5128
Dual, High PSRR, 200mA Low Dropout Regulator
PIN DESCRIPTIONS
Symbol
VIN
GND
VEN1
VEN2
VOUT1
VOUT2
SOT23-6 Description
5 Input of LDO
2 Ground
4 LDO1 Enable Input Logic, Enable High
3 LDO2 Enable Input Logic, Enable High
6 Output of LDO1
1 Output of LDO2
SIMPLIFIED BLOCK DIAGRAM
VIN
VEN1
Thermal
Shutdown
VEN2
Current
Limit
Voltage
Reference
Current
Limit
Voltage
Reference
RA1
RA2
RB1
RB2
GND
VOUT1
Figure 1. Major functional blocks in the PT5128
In Figure 1, the block of Voltage Reference provides the
reference voltage of the LDO.
The op-amp block is used as the error amplifier of the
LDO which compares the output feedback voltage with
the reference. Its output controls the gate of a large
VOUT2 PMOS pass element and hereby adjusts the output
voltage.
The resistor RA1 and RA2 (or RB1, RB2) form a voltage
divider to provide the feedback voltage.
The Current Limit block senses the LDO output current
and limits the output current from being too high. This is
mostly a short circuit protection feature.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VIN Range
VOUT1, VOUT2 Range
VEN 1, VEN 2 Range
Maximum Power
Dissipation (Note1)
SOT23-6
Junction Temp.
Storage Temp.
Lead Temp. (Note2)
ESD Rating, HBM
www.micro-bridge.com
VALUE
-0.3~6.0V
-0.3~(VIN+0.3)< 6.0V
-0.3~6.0V
360
150
-65~150
235
2
UNIT
V
V
V
mW
°C
°C
°C
KV
Page 2

No Preview Available !

OPERATING RANGE
PARAMETER
VIN Range
VEN 1, VEN 2 Range
Thermal Resistance,
θJA
Maximum Power
Dissipation (Note3)
Operation Temp.
PT5128
Dual, High PSRR, 200mA Low Dropout Regulator
SOT23-6
SOT23-6
VALUE
-0.3~5.5V
-0.3~(VIN+0.3)<5.5V
220
250
-40~85
UNIT
V
V
°C/W
mW
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified:
VIN = VOUT(nom) + 1.0V, VEN1 = VEN1 = VIN, CIN = 1uF, IOUT = 30mA, COUT1 = COUT2 =1uF, TA = +25°C. (Note 4) (Note5)
Symbol Parameter
Conditions
Typ. Min. Max. Unit
Output Voltage Error
IOUT = 1mA
-2 2 %VOUT
VOUT
Line Regulation Error
Load Regulation Error
(Note 6)
IOUT = 30mA,
VIN=(VOUT(nom) + 0.5V) to 5.5V
IOUT = 1mA to 200mA
0.03 -0.2
15
0.2
50
%/V
mV
IOUTMAX
Maximum Output
Current
200 mA
PSRR
Power Supply Rejection
Ratio (Note 7)
VIN = VOUT(nom) +
1.0V
VIN(AC) = 0.2V
f=
100Hz
f = 1KHz
f=
10KHz
IOUT =
50mA
IOUT =
50mA
IOUT =
50mA
72
62
58
dB
IQ
Quiescent Current
IOUT = 0mAVOUT = 2.5V
VEN = 0V
60 110
uA
0.1 1.0
VDIFF
ISC
Dropout Voltage
Output Short Current
Limit
IOUT = 50mA
IOUT = 100mA
VOUT1 or VOUT2 Grounded
55 80
mV
108 150
300 mA
TON
VIL
VIH
TSD
VOUT/
VOUT
Turn-On Time (Note 8)
Maximum Low Input
Level at VEN1 and VEN2
Minimum High Input
Level at VEN1 and VEN2
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
VOUT Temperature
Characteristics
VIN = 2.5 to 5.5
VIN = 2.5 to 5.5
Temperature = -40 to 125OC
72
0.4
1.4
us
V
V
160 °C
20 °C
77 ppm/°C
www.micro-bridge.com
Page 3