RS7215-285ULFEJP
更新时间：2024-09-18 12:25:44
品牌：ORISTER
描述：1A Adjustable & Fixed Voltage LDO Linear Regulator with Enable Function & Fast Discharge
概述
数据手册RS7215-285ULFEJP 概述
1A Adjustable & Fixed Voltage LDO Linear Regulator with Enable Function & Fast Discharge 1A可调及固定电压LDO线性稳压器，带有使能功能和快速放电
RS7215-285ULFEJP 数据手册
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RS7215
1A Adjustable & Fixed Voltage LDO Linear Regulator with Enable Function & Fast Discharge
General Description
The RS7215 series is a low‐dropout linear regulator with ON/OFF control that operates in the input voltage range from
+2.4V to +7.0V and delivers 1.0A output current.
The RS7215 is available in two types, fixed output voltage type and adjustable output voltage type. The fixed output
voltage type is preset at an internally trimmed voltage 1.8V, 2.5V, or 3.3V. Other options 1.2V, 1.5V, 2.85V, 3.0V and 3.6V
are available by special order only. The output voltage range of the adjustable type is from 1.175V to 5V.
The RS7215 (ADJ type) consists of a 1.175V bandgap reference, an error amplifier, and a P‐channel pass transistor. Other
features include short‐circuit protection and thermal shutdown protection.
The RS7215 (Fixed type) consists of a 0.95V bandgap reference, an error amplifier, and a P‐channel pass transistor. Other
features include short‐circuit protection and thermal shutdown protection. The RS7215 series devices are available in SOT‐
223‐5, TO‐252‐5 packages.
Features
Applications
◎ Operating Voltage Range：+2.4V to +7.0V
◎ Output Voltages：+1.0V to +5.0V (0.1V Step) (Fixed),
+1.175V to +5.0V (ADJ Type)
◎ Dropout Voltage：700mV@1000mA (Fixed)
◎ Fast Response in Power‐on (Fixed Voltage Only)
◎ Low Current Consumption：60μA (Typ.)
◎ Low ESR Capacitor Compatible
◎ Battery‐Powered Equipments
◎ Graphic Card, Peripheral Card
◎ PCMCIA & New Card
◎ Mini PCI & PCI‐Express Cards
◎ Digital Still Camera
◎ CDMA/GSM Cellular Handsets
◎ Laptop, Palmtops, Notebook Computers
◎ Portable Information Application
◎ High Ripple Rejection：55dB (Typ.)
◎ Short Circuit Protection：600mA (Typ.)
◎ Thermal Overload Shutdown Protection
◎ SOT‐223‐5, TO‐252‐5 packages
◎ RoHS Compliant and 100% Lead (Pb)‐Free and Green
(Halogen Free with Commercial Standard)
Application Circuits
This integrated circuit can be damaged by ESD. Orister Corporation recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
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Pin Assignments
SOT‐223‐5
TO‐252‐5
PACKAGE
PIN
1
2
SYMBOL
VIN
VOUT
DESCRIPTION
Regulator Input Pin
Regulator Output Pin
No Connect for Fixed Voltage or ADJ Terminal Pin for
SOT‐223‐5
3
NC/ADJ
Adjustable.
Enable Pin
Ground Pin
4
5
EN
GND
PACKAGE
PIN
1
SYMBOL
VIN
DESCRIPTION
Regulator Input Pin
2
3
VOUT
GND
Regulator Output Pin
Ground Pin
TO‐252‐5
No Connect for Fixed Voltage or ADJ Terminal Pin for
Adjustable.
4
5
NC/ADJ
EN
Enable Pin
Ordering Information
DEVICE
DEVICE CODE
XX is nominal output voltage (for example, AD=ADJ, 18 = 1.8V, 33 = 3.3V, 285 = 2.85V).
EEE is CE Input Logic & Discharge Function Selection : (see CE & Discharge Function Selection
Table)
YY is package designator :
RS7215‐XX EEE YY Z
SK : SOT‐223‐5
EJ : TO‐252‐5
Z is Lead Free designator :
P: Commercial Standard, Lead (Pb) Free and Phosphorous (P) Free Package
G: Green (Halogen Free with Commercial Standard)
CE & Discharge Function Selection Table
EEE
CODE
NHF
NLF
NHN
NLN
UHF
ULF
EN Type
EEE
CODE
UHN
ULN
DHF
DLF
EN Type
Discharge
Discharge
Type 1
None
None
None
None
Type 2
Type 1
Pull High
Pull High
Pull Low
Pull Low
Pull Low
Pull Low
Type 2
High Active
Low Active
High Active
Low Active
High Active
Low Active
Fast
Fast
Normal
Normal
Fast
High Active
Low Active
High Active
Low Active
High Active
Low Active
Normal
Normal
Fast
Fast
Normal
Normal
Pull High
Pull High
DHN
DLN
Fast
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Block Diagram
Fixed Voltage Type
Adjustable Voltage Type
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Absolute Maximum Ratings
Parameter
Symbol
VIN
ILIMIT
TJ
Ratings
9.0
1.3
+155
155
90
Units
V
Input Voltage VIN to GND
Output Current Limit, I(LIMIT)
Junction Temperature
A
oC
SOT‐223‐5
TO‐252‐5
SOT‐223‐5
TO‐252‐5
Thermal Resistance
Power Dissipation
oC/W
θJA
900
1200
‐40 ~ +85
‐55~+150
+260
PD
mW
Operating Ambient Temperature
Storage Temperature
Lead Temperature (soldering, 10sec)
TOPR
TSTG
‐
oC
oC
oC
NOTES：
1
The power dissipation values are based on the condition that junction temperature TJ and ambient temperature TA difference is
100°C.
2
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress
ratings only, and function operation of the device at these or any other conditions beyond those indicated under “recommended
operating conditions” is not implied. Exposure to absolute‐maximum –rated conditions for extended periods may affect device
reliability.
Electrical Characteristics (TA=25°C, VIN=5.0V unless otherwise specified)
Symbol
VIN
Parameter
Input Voltage
Conditions
Min. Typ. Max.
Unit
V
V
mV
V
mV
mA
‐
2.4
‐2%
‐35
‐2%
‐50
‐
7.0
+2%
+35
+2%
+50
‐
VIN=VOUT+1.0V, IOUT=1mA, VOUT≧1.8V
VIN=VOUT+1.0V, IOUT=1mA, VOUT＜1.8V, VIN＞2.4V
VIN=VOUT+1.2V, IOUT=1mA, VOUT≧1.8V
VIN=VOUT+1.2V, IOUT=1mA, VOUT＜1.8V, VIN＞2.4V
Fixed
Type
ADJ
VOUT
Output Voltage
VOUT
Type
IMAX
VREF
Output Current (see NOTE)
ADJ Pin Reference Voltage
1000
‐
1.17
5
VOUT+1.0V≦VIN≦7.0V, VOUT≧2.4V
For Adjustable Voltage Type
‐
‐
V
IOUT=500mA, VOUT>3.0V
IOUT=1000mA, VOUT>3.0V
IOUT=1000mA, VOUT>3.0V
VOUT+1.0V≦VIN≦7V, IOUT=1mA (Fixed Type)
‐
‐
‐
‐
‐
‐
‐
300
700
‐
0.2
‐
0.01
60
0.7
0.1
600
55
40
‐
‐
‐
Dropout Voltage (Fixed Type)
Dropout Voltage (ADJ Type)
Line Regulation
VDROP
mV
1100
0.3
0.2
ΔVLINE
%/V
VOUT+1.2V≦VIN≦7V, IOUT=1mA, VIN≧2.8V
ΔVLOAD
IQ
ISD
IADJ
ISC
PSRR
eN
VIH
VIL
RDIS
TDIS
Load Regulation
Ground Pin Current
Shutdown Current
ADJ Pin Current
Short Circuit Current
Ripple Rejection
0.02 %/mA
VIN=VOUT+1V, 1mA≦IOUT≦100mA
ILOAD=0mA to 1.0A, VIN=VOUT+1.0V
VIN=VOUT+1V, EN=0V, No Load
ILOAD=0mA to 1000mA, VIN=VOUT+1.0V
‐
IOUT=30mA, F=1KHz, COUT=10uF
IOUT=100mA , F=1KHz, COUT=10uF
VIN≦5.0V
90
1.05
0.15
‐
‐
‐
uA
uA
uA
mA
dB
uV(rms)
V
V
Ω
us
‐
‐
‐
Output Noise
‐
1.6
‐
‐
‐
EN Pin Input Voltage “H”
EN Pin Input Voltage “L”
Discharge Resistor
Discharge Time
‐
VIN≦5.0V
‐
30
70
0.3
100
100
VEN=0V, For Fixed Voltage Type
VOUT=3.3V to 0V, COUT=1uF, For Fixed Voltage Type
Thermal Shutdown
Temperature
Thermal Shutdown Hysteresis
TSD
‐
‐
‐
‐
150
20
‐
‐
oC
oC
THYS
NOTE：Measured using a double sided board with 1” x 2” square inches of copper area connected to the GND pins for “heat spreading”.
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Detail Description
The RS7215 is a low‐dropout linear regulator. The device provides preset 1.8V, 2.5V and 3.3V output voltages for output
current up to 1.0A. Adjustable output voltage and other mask options for special output voltages are also available. As
illustrated in function block diagram, it consists of a 1.175V bandgap (Fixed voltage type is 0.95V) reference, an error
amplifier, a P‐channel pass transistor and an internal feedback voltage divider.
The bandgap reference for fixed voltage types is connected to the error amplifier, which compares this reference with the
feedback voltage and amplifies the voltage difference. If the feedback voltage is lower than the reference voltage, the pass‐
transistor gate is pulled lower, which allows more current to pass to the output pin and increases the output voltage. If the
feedback voltage is too high, the pass transistor gate is pulled up to decrease the output voltage.
The output voltage is feed back through an internal resistive divider (or external resistive divider for adjustable output
voltage type) connected to VOUT pin. Additional blocks include an output current limiter, thermal sensor, and shutdown logic.
Internal P‐channel Pass Transistor
The RS7215 features a P‐channel MOSFET pass transistor. Unlike similar designs using PNP pass transistors, P‐channel
MOSFETs require no base drive, which reduces quiescent current. PNP‐based regulators also waste considerable current in
dropout when the pass transistor saturates, and use high base‐drive currents under large loads. The RS7215 does not suffer
from these problems and consumes only 60μA (Typ.) of current consumption under heavy loads as well as in dropout
conditions.
Enable Function
EN pin starts and stops the regulator. When the EN pin is switched to the power off level, the operation of all internal circuit
stops, the build‐in P‐channel MOSFET output transistor between pins VIN and VOUT is switched off, allowing current
consumption to be drastically reduced. The VOUT pin enters the GND level through the internal discharge path between VOUT
and GND pins.
Fast Discharge Function
The RS7215 fixed type has fast discharge Function on EN pin disable. When user turns off the device, its internal pull‐low
resistor will discharge output capacitor charge. It’ll avoid other device to arise wrong motions.
Output Voltage Selection
For fixed voltage type of RS7215, the output voltage is preset at an internally trimmed voltage. The first two digits of part
number suffix identify the output voltage (see Ordering Information). For example, the RS7215‐33 has a preset 3.3V output
voltage.
For adjustable voltage type of RS7215, the output voltage is set by comparing the feedback voltage at adjust terminal to the
internal bandgap reference voltage. The reference voltage VREF is 1.175V. The output voltage is given by the equation:
R1
R2
⎛
⎞
⎟
VOUT =VREF × 1 +
⎜
⎝
⎠
Current Limit
The RS7215 also includes a fold back current limiter. It monitors and controls the pass transistor’s gate voltage, estimates the
output current, and limits the output current within 1.3A.
Thermal Overload Protection
Thermal overload protection limits total power dissipation in the RS7215. When the junction temperature exceeds TJ=+150°C,
a thermal sensor turns off the pass transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor on
again after the junction temperature cools down by 20°C, resulting in a pulsed output during continuous thermal overload
conditions.
Thermal overload protection is designed to protect the RS7215 in the event of fault conditions. For continuous operation, the
absolute maximum operating junction temperature rating of TJ=+125°C should not be exceeded.
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Operating Region and Power Dissipation
Maximum power dissipation of the RS7215 depends on the thermal resistance of the case and circuit board, the temperature
difference between the die junction and ambient air, and the rate of airflow. The power dissipation across the devices is P =
IOUT x (VIN‐VOUT). The resulting maximum power dissipation is:
(TJ −TA)
θJC +θCA
(TJ −TA)
θJA
PMAX =
=
Where (TJ‐TA) is the temperature difference between the RS7215 die junction and the surrounding air, θJC is the thermal
resistance of the package chosen, and θCA is the thermal resistance through the printed circuit board, copper traces and
other materials to the surrounding air. For better heat‐sinking, the copper area should be equally shared between the VIN,
VOUT, and GND pins.
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. The RS7215 use a P‐channel MOSFET
pass transistor, its dropout voltage is a function of drain‐to‐source on‐resistance RDS(ON) multiplied by the load current.
VDROPOUT =VIN −VOUT = RDS (ON ) × IOUT
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SOT‐223‐5 Dimension
NOTES:
A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion.
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TO‐252‐5 Dimension
NOTES:
A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion.
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Soldering Methods for Orister’s Products
1. Storage environment: Temperature=10oC~35oC Humidity=65%±15%
2. Reflow soldering of surface‐mount devices
Figure 1: Temperature profile
t
P
Critical Zone
to T
TP
T
L
P
Ramp-up
TL
t
L
Tsmax
Tsmin
t
S
Preheat
Ramp-down
25
t 25oC to Peak
Time
Profile Feature
Average ramp‐up rate (TL to TP)
Preheat
Sn‐Pb Eutectic Assembly
Pb‐Free Assembly
<3oC/sec
<3oC/sec
‐ Temperature Min (Tsmin
)
100oC
150oC
150oC
200oC
‐ Temperature Max (Tsmax
‐ Time (min to max) (ts)
Tsmax to TL
)
60~120 sec
60~180 sec
‐ Ramp‐up Rate
<3oC/sec
<3oC/sec
Time maintained above:
‐ Temperature (TL)
‐ Time (tL)
183oC
217oC
60~150 sec
240oC +0/‐5oC
60~150 sec
260oC +0/‐5oC
Peak Temperature (TP)
Time within 5oC of actual Peak
10~30 sec
20~40 sec
Temperature (tP)
Ramp‐down Rate
Time 25oC to Peak Temperature
<6oC/sec
<6oC/sec
<6 minutes
<8 minutes
3. Flow (wave) soldering (solder dipping)
Products
Pb devices.
Peak temperature
245oC ±5oC
260oC +0/‐5oC
Dipping time
5sec ±1sec
5sec ±1sec
Pb‐Free devices.
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Important Notice:
© Orister Corporation
Orister cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an Orister product.
No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied.
Orister reserves the right to make changes to their products or specifications or to discontinue any product or service
without notice. Except as provided in Orister’s terms and conditions of sale, Orister assumes no liability whatsoever, and
Orister disclaims any express or implied warranty relating to the sale and/or use of Orister products including liability or
warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other
intellectual property right. In order to minimize risks associated with the customer’s applications, adequate design and
operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other
quality control techniques are utilized to the extent Orister deems necessary to support this warranty. Specific testing of
all parameters of each device is not necessarily performed.
Orister and the Orister logo are trademarks of Orister Corporation. All other brand and product names appearing in this
document are registered trademarks or trademarks of their respective holders.
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