Preliminary
RT9016
500mA Peak, Thermal Folded Back CMOS LDO Regulator
General Description
The RT9016 is designed for portable RF and wireless
applications with demanding performance and space
requirements. The RT9016 performance is optimized for
battery-powered systems to deliver ultra low noise and
low quiescent current. A noise bypass pin is available for
further reduction of output noise. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life. The RT9016 also works with low-ESR ceramic
capacitors, reducing the amount of board space necessary
for power applications, critical in hand-held
wireless
devices. The RT9016 consumes less than 0.01μA in
shutdown mode and has fast turn-on time less than 50μs.
RT9016
is short circuit thermal folded back
protected.
RT9016 lowers its OTP trip point from 165°C to 110°C
when output short circuit occurs (V
OUT
< 0.4V) providing
maximum safety to end users.
The other features include
ultra low dropout voltage, high output accuracy, current
limiting protection, and high ripple rejection ratio. Available
in the SOT-23-5
and WDFN-6L 2x2 packages.
Features
Short Circuit Thermal Folded Back Protection
Ultra-Low-Noise for RF Application
Ultra-Fast Response in Line/Load Transient
Quick Start-Up (Typically 50μs)
μ
0.01μA Standby Current When Shutdown
μ
Low Dropout : 380mV @ 500mA
Wide Operating Voltage Ranges : 2.5V to 5.5V
TTL-Logic-Controlled Shutdown Input
Low Temperature Coefficient
Current Limiting Protection
Thermal Shutdown Protection
Only 1μF Output Capacitor Required for Stability
μ
High Power Supply Rejection Ratio
Custom Voltage Available
RoHS Compliant and 100% Lead (Pb)-Free
Applications
CDMA/GSM Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Appliances
Ordering Information
RT9016-
Package Type
B : SOT-23-5
QW : WDFN-6L 2x2 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Output Voltage
15 : 1.5V
16 : 1.6V
:
34 : 3.4V
35 : 3.5V
1H : 1.85V
2H : 2.85V
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Pin Configurations
(TOP VIEW)
VIN
GND
EN
1
2
3
4
BP
5
VOUT
Note :
Richtek Pb-free and Green products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
EN
GND
VIN
1
2
3
7
6
5
4
BP
NC
VOUT
SOT-23-5
WDFN-6L 2x2
DS9016-03 August 2007
www.richtek.com
1
RT9016
Typical Application Circuit
Preliminary
RT9016
V
IN
C
IN
1uF
VIN
GND
EN
BP
C
BP
22nF
VOUT
C
OUT
1uF
V
OUT
Chip Enable
Functional Pin Description
Pin Name Pin Function
VIN
GND
EN
BP
VOUT
Input Voltage.
Ground.
Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ
resistor connected to GND when the control signal is floating.
Reference Noise Bypass.
Output Voltage.
Function Block Diagram
EN
Quick
Start
BP
V
REF
-
+
Shutdown
and
Logic Control
VIN
MOS Driver
VOUT
Current-Limit
and
Thermal
Protection
GND
Error
Amplifier
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2
DS9016-03 August 2007
Preliminary
Absolute Maximum Ratings
(Note 1)
RT9016
6V
400mW
606mW
250°C/W
165°C/W
Supply Input Voltage ------------------------------------------------------------------------------------------------------
Power Dissipation, P
D
@ T
A
= 25°C
SOT-23-5 --------------------------------------------------------------------------------------------------------------------
WDFN-6L 2x2 --------------------------------------------------------------------------------------------------------------
Package Thermal Resistance (Note 4)
SOT-23-5,
θ
JA
---------------------------------------------------------------------------------------------------------------
WDFN-6L 2x2,
θ
JA
---------------------------------------------------------------------------------------------------------
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Junction Temperature ---------------------------------------------------------------------------------------------------- 150°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C
to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions
(Note 3)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−40°C
to 85°C
Electrical Characteristics
(V
IN
= V
OUT
+ 1V, C
IN
= C
OUT
= 1μF, C
BP
= 22nF, T
A
= 25°C, unless otherwise specified)
Parameter
Output Voltage Accuracy
Current Limit
Quiescent Current
Dropout Voltage
Line Regulation
Load Regulation
Standby Current
EN Input Bias Current
EN Threshold
(Note 5)
Symbol
ΔV
OUT
I
LIM
I
Q
V
DROP
ΔV
LINE
Test Conditions
I
OUT
= 1mA
R
LOAD
= 1Ω
V
EN
Min
−2
530
--
--
--
--
--
--
--
--
1.2
--
--
--
Typ
--
--
90
220
380
--
--
0.01
0
--
--
100
−70
−50
Max
+2
--
130
--
--
0.3
0.6
1
100
0.4
--
--
--
--
Units
%
mA
μA
mV
%
%
μA
nA
V
μV
RMS
dB
≥
1.2V, I
OUT
= 0mA
I
OUT
= 300mA, V
OUT
> 2.8V
I
OUT
= 500mA, V
OUT
> 2.8V
V
IN
= (V
OUT
+ 0.3V) to 5.5V,
I
OUT
= 1mA
V
EN
= GND, Shutdown
V
EN
= GND or V
IN
V
IN
= 3V to 5.5V, Shutdown
V
IN
= 3V to 5.5V, Start-Up
10Hz to 100kHz, I
OUT
= 200mA
C
OUT
= 1μF
C
OUT
= 1μF, I
OUT
= 10mA
ΔV
LOAD
1mA
<
I
OUT
<
500mA
I
STBY
I
IBSD
Logic-Low Voltage V
IL
Logic-High Voltage V
IH
e
NO
PSRR
Output Noise Voltage
Power Supply
Rejection Rate
f = 100Hz
f = 10kHz
To be continued
DS9016-03 August 2007
www.richtek.com
3
RT9016
Parameter
Thermal Shutdown Temperature
Thermal Shutdown Temperature
Hysteresis
Thermal Folded Back
Symbol
T
SD
ΔT
SD
Preliminary
Test Conditions
Min
--
--
--
Typ
165
30
110
Max
--
--
--
Units
°C
°C
°C
Note 1.
Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. 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 remain possibility to affect device reliability.
Note 2.
Devices are ESD sensitive. Handling precaution recommended.
Note 3.
The device is not guaranteed to function outside its operating conditions.
Note 4.
θ
JA
is measured in the natural convection at T
A
= 25°C on a low effective thermal conductivity test board
(Single Layer, 1S) of JEDEC 51-3 thermal measurement standard.
Note 5.
The dropout voltage is defined as V
IN
-V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
−
100mV.
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4
DS9016-03 August 2007
Preliminary
Typical Operating Characteristics
Output Voltage vs. Temperature
1.8
1.7
RT9016
Quiescent Current vs. Temperature
95
90
Quiescent Current (uA)
50
75
100
125
RT9016-15PB
V
IN
= 3.3V
C
IN
= C
OUT
= 1uF X7R
RT9016-15PB
V
IN
= 3.3V
C
IN
= C
OUT
= 1uF X7R
Output Voltage (V)
1.6
1.5
1.4
1.3
1.2
-50
-25
0
25
85
80
75
70
65
60
-50
-25
0
25
50
75
100
125
Temperature
(°C)
Temperature
(°C)
Dropout Voltage vs. Load Current
600
500
RT9016-33PB
C
IN
= C
OUT
= 1uF
T
J
= 125°C
20
PSRR
V
IN
= 4V to 5V
C
IN
= C
OUT
= 1uF,
X7R
Dropout Voltage (mV)
0
PSRR (dB)
T
J
= -40°C
400
300
200
100
0
0
100
200
T
J
= 25°C
-20
-40
-60
I
LOAD
= 100mA
I
LOAD
= 10mA
-80
300
400
500
10
0.01
100
0.1
1K
1
10K
10
100K
100
1M
1000
Load Current (mA)
Frequency (kHz)
(Hz)
EN Pin Shoutdown Threshold vs. Temperature
1.75
EN Pin Shutdown Response
EN Pin Voltage
(V)
10
5
0
V
IN
= 5V
C
IN
= C
OUT
= 1uF
RT9016-28PB
No Load
EN Pin Shoutdown Threshold (V)
1.5
RT9016-15PB
V
IN
= 3.3V
C
IN
= C
OUT
= 1uF X7R
1.25
1
Output Voltage
(V)
-50
-25
0
25
50
75
100
125
2
1
0
0.75
0.5
Time (500μs/Div)
Temperature
(°C)
DS9016-03 August 2007
www.richtek.com
5
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