IMP2054, IMP2055 and IMP2186

IMP205 4/55, IMP2 1 86
POWER MANAGEMENT
60mA/110mA/160mA
Super Low Dropout CMOS
Regulators with Battery Life
Extending Shutdown Mode and
ERROR Output
The IMP2054, IMP2055 and IMP2186 high performance CMOS low
dropout voltage regulators offer superior dropout voltage performance
and load regulation characteristics as compared to the pin compatible
TC1054/1055/1186 devices offered by TelCom Semiconductor. Dropout
voltage performance has been improved by up to 40%.
Load regulation and power supply PSRR have been optimized. Load
regulation is typically 0.32% and PSRR is 53dB at 1kHz.
A logic input controlled shutdown mode extends system battery life by
reducing quiescent current to 0.2µA maximum. The shutdown mode can
be initiated by a system microcontroller.
The regulators were designed with ease of use and stability in mind.
Stability is guaranteed for 0.47µF and greater load capacitors with an
ESR up to 5Ω. Ceramic or tantalum capacitors can be used.
Three devices with different guaranteed output current specifications
are available: IMP2054 (60mA), IMP2055 (110mA) and IMP2186
(160mA). Each device has output voltage options of 2.5V, 2.7V, 2.85V,
3.0V, 3.3V, 3.6V and 4.0V.
Key Features
◆ Pin Compatible with TelCom TC1054/1055/1186
◆ Lower Dropout Voltage for Long Battery Life
– IMP2054: 70mV vs. TelCom TC1054 120mV
– IMP2055: 160mV vs. TelCom TC1055 250mV
– IMP2186: 250mV vs. TelCom TC1186 400mV
◆ Power Saving Shutdown Mode
– 0.2µA shutdown current
◆ ERROR Output
– Low battery detection
– Processor reset
◆ Superior Load Regulation
– 0.32%
◆ Long Battery Life
– 33µA no load ground current
◆ Accurate Output Voltage
– ± 2.5% over temperature
◆ Low Drift Output: 40ppm/°C
◆ Guaranteed Minimum Output Current
– IMP2054: 60mA
– IMP2055: 110mA
– IMP2186: 160mA
◆ Over-Current and Over-Temperature Protection
◆ Compact SOT-23A-5 Package
Applications
Typical Application
1MΩ
1
+
1µF
VIN
VOUT
IMP2054
IMP2055
IMP2186
ERROR
Shutdown*
Control
3
5
VOUT
◆
◆
◆
◆
◆
◆
◆
Pagers
Cellular/GSM/PHS Phones
Instrumentation
Wireless Terminals
Battery Powered Systems
Medical Instruments
Linear Post-Regulators
1µF
4
SHDN
GND
2
* Tie to VIN if not used.
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2054/55_02.eps
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1
IMP205 4/55, IMP2 1 86
Pin Configuration
SOT-23A
VIN
1
GND
2
SHDN
3
5
VOUT
4
ERROR
IMP2054/55
IMP2186
2054/55_01.eps
Pin Descriptions
Pin Number
Name
Function
1
2
3
VIN
GND
SHD N
4
ERRO R
5
VOUT
Unregulated supply input.
Ground terminal.
Shutdown control input. A shutdown mode is entered when SHDN is a logic LOW. During
shutdown the output voltage falls to 0V and quiescent current drops to 2.0µA.
Out-of-Regulation Flag output. An open drain output that goes LOW when the output is
out-of-tolerance by approximately 5%.
Output voltage
2054/55_t01.eps
Ordering Information
Part Number*
IMP2054-2.5JUK/T
IMP2054-2.7JUK/T
IMP2054-2.85JUK/T
IMP2054-3.0JUK/T
IMP2054-3.3JUK/T
IMP2054-3.6JUK/T
IMP2054-4.0JUK/T
IMP2055-2.5JUK/T
IMP2055-2.7JUK/T
IMP2055-2.85JUK/T
IMP2055-3.0JUK/T
IMP2055-3.3JUK/T
IMP2055-3.6JUK/T
IMP2055-4.0JUK/T
IMP2186-2.5JUK/T
IMP2186-2.7JUK/T
IMP2186-2.85JUK/T
IMP2186-3.0JUK/T
IMP2186-3.3JUK/T
IMP2186-3.6JUK/T
IMP2186-4.0JUK/T
xx = Date Code
2
Package
Output
Voltage
(V)
Output
Current
(mA)
60
2.5
SOT23A-5
SOT23A-5
2. 7
60
SOT23A-5
2.85
60
SOT23A-5
3. 0
60
SOT23A-5
3. 3
60
SOT23A-5
3. 6
60
SOT23A-5
4. 0
60
SOT23A-5
2. 5
110
110
2. 7
SOT23A-5
SOT23A-5
2.85
110
SOT23A-5
3.0
110
SOT23A-5
3.3
110
SOT23A-5
3.6
110
SOT23A-5
4. 0
110
SOT23A-5
2. 5
160
SOT23A-5
2.7
160
SOT23A-5
2.85
160
SOT23A-5
3. 0
160
SOT23A-5
3.3
160
SOT23A-5
3.6
160
SOT23A-5
4.0
160
* /T indicates Tape and Reel
Shutdown
Pin
ERROR
Adjust Flag
Reference
Pin Output Bypass Pin
Package Marking
A
B
C
D
R
R
R
R
R
R
R
T
T
T
T
T
T
T
Y
Y
Y
Y
Y
Y
Y
A
B
C
D
E
F
G
A
B
C
D
E
F
G
A
B
C
D
E
F
G
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
2054/55_t03.eps
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IMP205 4/55, IMP2 1 86
Absolute Maximum Ratings
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . – 0.3V to VIN + 0.3V
Maximum Voltage on Any Pin . . . . . . . . . . . . – 0.3V to (VIN + 0.3V)
Shutdown Voltage (SHDN) . . . . . . . . . . . . . . SHDN ≤ VIN + 0.3V
These are stress ratings only and functional operation is not implied.
Exposure to absolute maximum ratings for prolonged time periods may
affect device reliability. All voltages are with respect to ground.
Operating Junction Temperature Range . . . – 40°C < TJ < 125°C
Storage Temperature . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally limited
Note: TJ = Junction Temperature, TA = Ambient Temperature
Electrical Characteristics
VIN = VOUT +1V, IL = 100µA, C L = 1µF, SHDN > VIH , TA = 25°C, unless otherwise noted. Bold/blue specifications apply for junction
temperature range –40°C < TJ < 125°C.
Parameter
Input Voltage Range
Maximum Output Current
Fixed Output Voltage
Dropout Voltage (Note 2)
VIN
IOMAX
VOUT
Units
0°C < TJ < 125°C
6.50
V
– 40°C < TJ < 125°C
6.50
IMP2054
60
IMP2055
110
IMP2186
160
VR – 2.5%
Note 1
mA
VR ± 0.5%
VR + 2.5%
IL = 20mA
17
23
IL = 50mA
60
70
IL = 100mA (IMP2054, IMP2186)
90
160
IL = 150mA (IMP2186)
143
250
No load
33
50
µA
SHDN = 0V
TJ ≤ 25°C
0.2
2
µA
IINSD
Thermal Regulation
VR + 1V ≤ VIN ≤ 6V
mV
40
ppm/°C
0.04
%/W
0.0375
0.35
Notes: 1. VR is the regulated output voltage: 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V or 4.0V.
2. Dropout Voltage is defined as the difference between IN and OUT when VR drops 2% below its nominal value.
3. Specifications which would otherwise be affected by self-heating of the die are tested at a constant die temperature by
using low duty cycle pulse testing.
3. PSRR guaranteed by design.
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V
1
Output Temperature Coefficient
Line Regulation
T yp
VIN - VO IL = 100µA
Quiescent Current
(Ground Current)
Shutdown Supply Current
Max
Min
Symbol Conditions
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%
2054/55_t02a.eps
3
IMP205 4/55, IMP2 1 86
Electrical Characteristics
VIN = VOUT +1V, IL = 100µA, C L = 1µF, SHDN > VIH , TA = 25°C, unless otherwise noted. Bold/blue specifications apply for junction
temperature range of –40°C < TJ < 125°C.
Typ
Max
Units
IL = 100µA to 50mA
0.32
2.0
%
IMP2055
IL = 100µA to 100mA
0.32
2.0
IMP2186
IL = 100µA to 150mA
0.32
3.0
Parameter
Min
Symbol Conditions
Load Regulation:
IMP2054
Thermal Shutdown Die
Temperature
150
°C
Thermal Shutdown Hysteresis
12
°C
58
dB
Ripple Rejection
PSRR
VIN ≥ (VO + 1V) ± 0.25V Freq. = 1kHz
CO = 3.3µF ceramic
Freq. = 10kHz
45
Freq. = 1MHz
Output Noise
300Hz to 50kHz
IL = 50mA (IMP2054)
IL = 100mA
SHDN Input HIGH Threshold
2.5V ≤ VIN ≤ 6.5V
SHDN Input LOW Threshold
2.5V ≤ VIN ≤ 6.5V
34
µVRMS
280
45
% of VIN
15
1.5
ERROR Flag Minimum
Supply Voltage
% of VIN
V
ERROR Flag Threshold
Voltage
VTH
0.95VR
V
ERROR Flag Hysteresis
VHYS
50
mV
ERROR Flag Output Low
Voltage
IERROR = 1mA
75
Reverse Current into VOUT
V(IN) < V(OUT)
SHDN = HIGH = VIN
2.0
mA
V(IN) < V(OUT)
SHDN = LOW
2.7
µA
350
Output Current Limit
400
600
Notes: 1. VR is the regulated output voltage: 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V or 4.0V.
2. Dropout Voltage is defined as the difference between IN and OUT when VR drops 2% below its nominal value.
3. Specifications which would otherwise be affected by self-heating of the die are tested at a constant die temperature by
using low duty cycle pulse testing.
4. PSRR guaranteed by design.
4
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mV
mA
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IMP205 4/55, IMP2 1 86
Typical Characteristics
90
100
80
90
80
70
60
PSRR (dB)
PSRR (dB)
70
50
40
60
50
40
30
30
20
20
10
10
1
10
100
1k
Frequency (Hz)
10k
100k
1
10
100
1k
Frequency (Hz)
2054/55_04.eps
Figure 1. IMP2055 PSRR at ILOAD = 100mA
10k
100k
2054/55_05.eps
Figure 2. IMP2055 PSRR at ILOAD = 1mA
Enable
0V
∆VIN = 1V
5V/DIV
Output
VOUT
50mV/DIV
0V
1V/DIV
20µs/DIV
100µs/DIV
2054/55_12.eps
2054/55_13.eps
Figure 3. Line Transient Response
Figure 4. Enable Input Response
Load
Pulse
Load
Pulse
20mA/DIV
50mA/DIV
VOUT
VOUT
25mV/DIV
25mV/DIV
50µs/DIV
50µs/DIV
2054/55_09.eps
2054/55_10.eps
Figure 5. Load Transient Response (50mA Step)
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Figure 6. Load Transient Response (100mA Step)
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IMP205 4/55, IMP2 1 86
Typical Characteristics
100mA/DIV
100ms/DIV
2054/55_11.eps
Figure 7. Output Short Circuit Response
Application Information
The IMP2054, IMP2055 and IMP2186 have been designed to offer
exceptionally low dropout voltage, superior load regulation and
minimum quiescent power.
Shutdown Mode
A battery-life-extending mode is available. Through the active
LOW shutdown pin, SHDN, the regulator can be enabled or
turned off. The regulator is shutdown (turned off) when SHDN is
LOW and enabled (turned on) when SHDN is HIGH.
The shutdown signal can be supplied from a CMOS gate or from
an I/O port of a microcontroller.
During shutdown, the output voltage falls to 0V and the supply
current is typically only 200nA.
If the shutdown mode is not needed, SHDN should be connected
directly to the regulator input voltage pin.
ERROR Open Drain Output
ERROR is driven low whenever VOUT falls out of regulation by
more than 5 percent typically. This condition may be caused by
low input voltage, output current limiting, or thermal limiting.
The ERROR threshold is 5% below rated VOUT regardless of the
programmed output voltage value (e.g. ERROR = VOL at 4.7V
(typical) for a 5.0V regulator and 2.85V (typical) for a 3.0V regulator). ERROR output operation is shown in Figure 8.
6
Note that ERROR is active when VOUT falls to VTH, and inactive
when VOUT rises above VTH by VHYS.
As shown in Figure 9, ERROR can be used as a battery low flag, or
as a microcontroller RESET signal (with the addition of timing
capacitor C 2). R1 x C 2 should be chosen to maintain ERROR
below VIH of the processor RESET input for at least 200ms to allow
time for the system to stabilize.
Output Capacitor
The IMP2054, IMP2055 and IMP2186 were designed for stable
operation with a wide range of capacitor values and type. The
output capacitor should be above 0.47µF. A 1µF value is recommended. Ceramic or tantalum capacitors are suitable with an ESR
up to 5Ω.
Thermal Shutdown
An on-chip thermal protection circuit shuts the LDO regulator off
when the die temperature exceeds 150°C. There is a built in 12°C
hysteresis. The regulator will remain off until the die temperature
drops to approximately to 138°C.
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IMP205 4/55, IMP2 1 86
Application Information
1
+
VOUT
+
1µF
VTH
VIN
VOUT
Shutdown*
Control
3
VIH
2
VOL
2054/55_14.eps
VOUT
C1
1µF
R1
1MΩ
4
BATTLOW
or RESET
SHDN
GND
ERROR
+
V+
IMP2054
IMP2055
IMP2186
ERROR
HYSTERESIS (VHYS)
5
* Tie to VIN if unused.
+
C2
0.2µF
C2 required only if
ERROR is used as
a Processor RESET
Signal (see text).
2054/55_15.eps
Figure 8. ERROR Output Operation
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Figure 9. Typical Application Circuit
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IMP205 4/55, IMP2 1 86
Package Dimensions
Plastic SOT-23A (5-Pin)
Inches
Min
Nominal
Millimeters
Max
Min
Nominal
Max
—
—
1.15
—
0.40
—
0.10
2.90
—
1.60
0.95 BSC
1.90 BSC
0.45
0.60 REF
—
1.45
0.15
1.30
0.50
0.45
0.20
0.16
3.00
3.00
1.70
Plastic SOT-23 (5-Pin)*
D
e1
E1
e
A A2
A1
E
b
C
∅
L
L1
SOT-23 (5-Pin).eps
A
A1
A2
b
b1
c
c1
D
E
E1
e
e1
L
L1
∅
0.037
0.001
0.035
0.011
0.011
0.003
0.003
0.109
0.101
0.058
—
0.057
0.95
—
0.005
0.05
0.044
0.050
0.90
—
0.019
0.30
0.30
0.017
0.015
0.08
0.007
—
0.003
0.062
0.08
0.113
0.117
2.80
—
0.117
2.60
1.50
0.066
0.062
0.037 BSC
0.074 BSC
0.35
0.021
0.017
0.013
0.002 REF
0°
—
8°
0°
* JEDEC Drawing MO-178
♦
Add /T to Part Number for Tape and Reel.
0.55
8°
2054/55_t04.eps
Daily Silver IMP Microelectronics Co.,Ltd
7 keda Road , Hi-Tech Park,
NingBo,Zhejiang, P.R.C.
Post Code : 315040
Tel:(086)-574-87906358
Fax:(086)-574-87908866
e-mail:[email protected]
Website:www.ds-imp.com.cn
The IMP logo is a registered trademark of Daily Silver IMP.
All other company and product names are trademarks of their respective owners.
2005 Daily Silver IMP
Revision : A
Issue Date: 08/08/05
Type: Product