RT9187-11GSP [RICHTEK]
1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator; 1A ，超低压差，超高速的CMOS LDO稳压器
| 型号： | RT9187-11GSP |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | 1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator |
| 文件： | 总9页 (文件大小：157K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9187
1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator
General Description
Features
ꢀ Ultra-Low-Noise for RF Application
ꢀ Ultra-Fast Response in Line/Load Transient
ꢀ Quick Start-Up (Typically 40μs)
ꢀ < 0.1uA Standby Current When Shutdown
ꢀ Low Dropout : 240mV at 1A
The RT9187 is a high-performance, 1A LDO regulator,
offering extremely high PSRR and ultra-low dropout. Ideal
for portable RF and wireless applications with demanding
performance and space requirements.
Anoise reduction pin is also available for further reduction
of output noise. Regulator ground current increases only
slightly in dropout, further prolonging the battery life. The
RT9187 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
ꢀ Wide Operating Voltage Ranges : 2.5V to 5.5V
ꢀ TTL-Logic-Controlled Shutdown Input
ꢀ Current Limiting Protection
ꢀ Thermal Shutdown Protection
ꢀ Only 2.2uF Output Capacitor Required for Stability
ꢀ High Power Supply Rejection Ratio
ꢀ RoHS Compliant and 100% Lead (Pb)-Free
The RT9187 consumes less than 0.1uAin shutdown mode
and has fast turn-on time less than 40μs. The other features
include ultra-low dropout voltage, high output accuracy,
current limiting protection, and high ripple rejection ratio.
Available in the VDFN-8L 3x3 and SOP-8 (Exposed Pad)
package.
Applications
ꢀ CDMA/GSM Cellular Handsets
ꢀ Battery-Powered Equipment
ꢀ Laptop, Palmtops, Notebook Computers
ꢀ Hand-Held Instruments
Ordering Information
ꢀ Mini PCI & PCI-Express Cards
ꢀ PCMCIA & New Cards
-
RT9187(
)
Package Type
QV : VDFN-8L 3x3 (V-Type)
SP : SOP-8 (Exposed Pad-Option 1)
ꢀ Portable InformationAppliances
Marking Information
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
None : Adjustable Output
Fixed Output Voltage Code
Pin Configurations
10 : 1.0V
11 : 1.1V
:
32 : 3.2V
33 : 3.3V
1L : 1.34V
(TOP VIEW)
1
2
3
4
8
7
6
5
EN
NC
GND
BP/ADJ
VIN
VIN
VOUT
VOUT
9
Note :
VDFN-8L 3x3
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VIN
8
EN
VIN
VOUT
VOUT
2
3
4
7
6
5
NC
GND
GND
BP/ADJ
9
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
SOP-8 (Exposed Pad)
DS9187-09 April 2008
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1
RT9187
Typical Application Circuit
VIN
EN
VOUT
V
V
OUT
IN
VIN
EN
VOUT
V
V
C
IN
OUT
C
2.2uF
IN
OUT
C
2.2uF
C
IN
2.2uF
OUT
2.2uF
R1
R2
RT9187
RT9187
BP
ADJ
C
Chip Enable
BP
10nF
Chip Enable
GND
GND
Figure 1. Fixed Operation
Figure 2. Adjustable Operation
R
1
V
= 0.8 x (
) Volts
1+
OUT
R
2
Note: The value of R2 should be less than 80k to
maintain regulation.
Function Pin Description
Pin No.
Pin
Name
Pin Function
Fixed Output
Voltage
Adjustable
Output Voltage
1
2
3
4
1
2
3
4
VIN
Supply Input.
Supply Input.
VIN
VOUT
VOUT
Regulator Output.
Regulator Output.
Noise Reduction. Connecting a 10nF capacitor to GND to reduce
output noise.
5
--
5
BP
If external feedback resistors are applied, the output voltage will be:
= 0.8 × (1+ R1) Volts
--
ADJ
V
OUT
R2
6
7
6
7
GND
NC
Ground
No Internal Connection.
Enable Input Logic, Active High. When the EN goes to a logic low, the
device is in shutdown mode.
8
8
EN
NC
No Internal Connection. The exposed pad must be soldered to a
large PCB and connected to GND for maximum power dissipation.
Exposed Pad (9)
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DS9187-09 April 2008
RT9187
Function Block Diagram
VIN
EN
OTP
POR
BIAS
EN
-
+
V
REF
VOUT
Current Limit
ADJ
Quick start
GND
Adjustable
VIN
EN
EN
OTP
POR
BIAS
-
+
V
REF
VOUT
GND
Current Limit
BP
Quick start
Fixed
DS9187-09 April 2008
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RT9187
Absolute Maximum Ratings (Note 1)
ꢀ Supply Input Voltage-------------------------------------------------------------------------------------------------- 6V
ꢀ EN Input Voltage ------------------------------------------------------------------------------------------------------- 6V
ꢀ PowerDissipation, PD @ TA = 25°C
VDFN-8L 3x3 ----------------------------------------------------------------------------------------------------------- 0.923W
SOP-8 (Exposed Pad) ----------------------------------------------------------------------------------------------- 1.33W
ꢀ Package Thermal Resistance (Note 9)
VDFN-8L 3x3, θJC ----------------------------------------------------------------------------------------------------- 8.2°C/W
VDFN-8L 3x3, θJA ------------------------------------------------------------------------------------------------------ 108°C/W
SOP-8 (Exposed Pad), θJC ----------------------------------------------------------------------------------------- 15°C/W
SOP-8 (Exposed Pad)-8, θJA --------------------------------------------------------------------------------------- 75°C/W
ꢀ Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------- 260°C
ꢀ Junction Temperature ------------------------------------------------------------------------------------------------- 150°C
ꢀ Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C
ꢀ ESD Susceptibility (Note 2)
HBM ---------------------------------------------------------------------------------------------------------------------- 2kV
MM------------------------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 3)
ꢀ Supply Input Voltage-------------------------------------------------------------------------------------------------- 2.5V to 5.5V
ꢀ EN Input Voltage ------------------------------------------------------------------------------------------------------- 0V to 5.5V
ꢀ Junction Temperature Range---------------------------------------------------------------------------------------- −40°C to 125°C
ꢀ Ambient Temperature Range---------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 2.2μF (Ceramic) & CBP = 10nF, TA = 25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Output Voltage Accuracy
(Fixed Output Voltage)
ΔV
I
= 10mA
−2
0
+2
%
OUT
OUT
Output Voltage Range (Adjustable)
Quiescent Current (Note 6)
Standby Current (Note 7)
Current Limit
V
I
0.8
--
--
4.5
500
1
V
μA
μA
A
OUT_Adj
V
V
R
I
≥ V , I = 0mA
IH OUT
380
0.1
2.8
60
Q
EN
EN
I
I
≤ V ,V = 3.3V
--
STBY
LIM
IL IN
= 0.5Ω, V = 3.3V
2
3
LOAD
IN
= 0.25A (Note 8)
--
100
OUT
Dropout Voltage (Note 4)
V
mV
DROP
I
I
= 0.5A
= 1.0A
--
--
120
240
180
360
OUT
OUT
Load Regulation (Note 5)
(Fixed Output Voltage)
V
= (V
+ 0.5V)
IN
OUT
ΔV
--
0.4
--
%/A
LOAD
10mA < I
< 1.0A
OUT
Logic-Low Voltage
EN Threshold
V
V
I
V
V
V
= 3.3V
--
1.8
--
--
--
0.6
--
IL
IH
IN
IN
IN
V
Logic-High Voltage
= 3.3V
= 3.3V, Enable
Enable Pin Current
0.1
1
μA
EN
To be continued
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DS9187-09 April 2008
RT9187
Parameter
Symbol
Test Conditions
IOUT = 300mA
Min
Typ
Max Units
--
−60
--
f = 100Hz
f = 10kHz
Power Supply
Rejection Rate
PSRR
dB
--
--
--
−50
V
IN
= (V
+0.5) to 5.5V,
OUT
Line Regulation
Start-Up Time
--
0.3
%
ΔV
LINE
I
= 1mA
OUT
T
R
= 3Ω, 1nF ≤ C ≤ 0.1μF
--
--
--
40
170
30
--
--
--
μs
Start_Up
LOAD
BP
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T
SD
°C
ΔT
SD
ADJ
Reference Voltage Tolerance
ADJ Pin Current
V
I
0.784
--
0.8
10
0.816
100
V
REF
V
ADJ =V
nA
ADJ
REF
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 is recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV.
Note 5. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load
regulation in the load range from 10mA to 1.0A.
Note 6. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no
load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin
current.
Note 7. Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (VEN
>1.8V ).
Note 8. Performance at -5°C ≤ TA ≤ 85°C is assured by design.
Note 9. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
DS9187-09 April 2008
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RT9187
Typical Operating Characteristics
(COUT = 2.2μF/x5R, CBP = 10nF, unless otherwise specified )
Quiescent Current vs. Temperature
Quiescent Current vs. Input Voltage
500
500
400
300
200
100
0
VIN = 3.3V
VIN = 3.3V
400
300
200
100
0
-40
-25
0
25
50
75
100
125
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Temperature (°C)
Dropout Voltage vs. Load Current
Current Limit
300
250
200
150
100
50
VOUT = 2.8V
VIN = 3.3V
5
4
3
2
TJ = 25°C
1
0
TJ = 125°C
TJ = -40°C
0
Time (1ms/Div)
0.0
0.2
0.4
0.6
0.8
1.0
Load Current (A)
Start Up
EN Pin Shutdown Response
VIN = 3.3V, ILOAD : 560mA
4
2
0
10
5
0
2
1
0
4
2
VIN = 3.3V
0
ILOAD : 560mA
Time (25us/Div)
Time (100us/Div)
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DS9187-09 April 2008
RT9187
Line Transient Response
Line Transient Response
VIN = 3.3V to 4.3V, ILOAD : 1A
VIN = 3.3V to 4.3V, ILOAD : 800mA
4.3
3.3
4.3
3.3
10
100
0
0
-100
-10
Time (500us/Div)
Time (500us/Div)
Load Transient Response
Load Transient Response
VIN = 3.3V, ILOAD : 50mA to 1A
VIN = 3.3V, ILOAD : 50mA to 800mA
1
0
1
0
(1A/Div)
50
0
100
0
(50mV/Div)
-50
-100
Time (100us/Div)
Time (100us/Div)
Region of Stable COUT ESR vs. Load Current
100
PSRR
20
0
VIN = VEN = 3.8V
VIN = 3.3V
VIN = 6.0V
Unstable Range
10
Stable Range
1
-20
-40
-60
-80
0.1
ILOAD = 280mA
ILOAD = 10mA
0.01
0.001
Simulation Verify
0
0.2
0.4
0.6
0.8
1
10
100
1k
10k
100k 1M 10M
Load Current (A)
Frequency (Hz)
DS9187-09 April 2008
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RT9187
Outline Dimension
D2
D
L
E
E2
SEE DETAIL A
1
e
b
2
1
2
1
A
A3
DETAILA
Pin #1 ID and Tie Bar Mark Options
A1
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
A3
b
0.800
0.000
0.175
0.200
2.950
2.100
2.950
1.350
1.000
0.050
0.250
0.300
3.050
2.350
3.050
1.600
0.031
0.000
0.007
0.008
0.116
0.083
0.116
0.053
0.039
0.002
0.010
0.012
0.120
0.093
0.120
0.063
D
D2
E
E2
e
0.650
0.026
L
0.425
0.525
0.017
0.021
V-Type 8L DFN 3x3 Package
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DS9187-09 April 2008
RT9187
H
A
Y
M
EXPOSED THERMAL PAD
(Bottom of Package)
J
B
X
F
C
I
D
Dimensions In Millimeters Dimensions In Inches
Symbol
Min
Max
Min
Max
0.197
0.157
0.069
0.020
0.053
0.010
0.006
0.244
0.050
0.091
0.091
0.098
0.138
A
B
C
D
F
H
I
4.801
3.810
1.346
0.330
1.194
0.170
0.000
5.791
0.406
2.000
2.000
2.100
3.000
5.004
4.000
1.753
0.510
1.346
0.254
0.152
6.200
1.270
2.300
2.300
2.500
3.500
0.189
0.150
0.053
0.013
0.047
0.007
0.000
0.228
0.016
0.079
0.079
0.083
0.118
J
M
X
Y
X
Y
Option 1
Option 2
8-Lead SOP (Exposed Pad) Plastic Package
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
8F, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek.com
DS9187-09 April 2008
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