IMP2070, IMP2071 and IMP2187

IMP20 70/7 1 , IMP2 1 8 7
POWER MANAGEMENT
60mA/110mA/160mA
Super Low Dropout CMOS
Regulators with Battery Life
Extending Shutdown Mode and
Adjustable Output
The IMP2070, IMP2071 and IMP2187 feature an adjustable output voltage. Compared to the pin compatible TC1070/1071/1187 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: IMP2070 (60mA), IMP2071 (110mA) and IMP2187
(160mA).
Key Features
◆ Pin Compatible with TelCom TC1070/1071/1187
◆ Lower Dropout Voltage For Long Battery Life
– IMP2070: 70mV vs. TelCom TC1070 120mV
– IMP2071: 160mV vs. TelCom TC1071 250mV
– IMP2187: 250mV vs. TelCom TC1187 400mV
◆ Power Saving Shutdown Mode
– 0.2µA shutdown current
◆ Adjustable Output Voltage
◆ 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
– IMP2070: 60mA
– IMP2071: 110mA
– IMP2187: 160mA
◆ Over-Current and Over-Temperature Protection
◆ Compact SOT-23A-5 Package
Applications
Typical Application
1
+
1µF
VIN
VOUT
IMP2070
IMP2071
IMP2187
ADJ
Shutdown*
Control
3
VOUT
R1
1µF
4
Pagers
Cellular/GSM/PHS Phones
Instrumentation
Wireless Terminals
Battery Powered Systems
Medical Instruments
Linear Post-Regulators
SHDN
GND
2
* Tie to VIN if not used.
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5
◆
◆
◆
◆
◆
◆
◆
R2
R1
VOUT = VREF × 1 +
R2
VREF = 1.2V
2070/71_02.eps
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1
IMP20 70/7 1 , IMP2 1 8 7
Pin Configuration
SOT-23A
VIN
1
GND
2
SHDN
3
5
VOUT
4
ADJ
IMP2070
IMP2071
IMP2187
2070/71_01.eps
Pin Descriptions
Pin Number
Name
1
VIN
2
GND
3
SHDN
4
ADJ
Output voltage adjustment terminal.
5
VO U T
Output voltage.
Function
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.
2070/71_t01.eps
Ordering Information
Part Number*
Package
Output
Voltage
(V)
Output
Current
(mA)
Shutdown
Pin
ERROR
Reference
Adjust Flag
Pin Output Bypass Pin
Package Marking
A
B
C
D
IMP2070JUK/T
SOT23A-5 Adjustable
60
J
J
x
x
IMP2071JUK/T
SOT23A-5 Adjustable
110
K
J
x
x
IMP2187JUK/T
SOT23A-5 Adjustable
160
L
J
x
xx = Date Code
2
x
2070/71_t03.eps
* /T indicates Tape and Reel
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IMP20 70/7 1 , IMP2 1 8 7
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
Symbol Conditions
VIN
IOMAX
Min
Max
Units
0°C < TJ < 125°C
6.50
V
– 40°C < TJ < 125°C
6.50
IMP2070
60
IMP2071
110
IMP2187
160
Adjustable Output Voltage
Range
Reference Voltage
Dropout Voltage (Note 1)
1.165
VREF
1.20
5.5
V
1.235
V
VIN - VO IL = 100µA
1
IL = 20mA
17
23
IL = 50mA
60
70
IL = 100mA (IMP2070, IMP2187)
90
160
IL = 150mA (IMP2187)
143
250
No load
33
50
µA
SHDN = 0V
TJ ≤ 25°C
0.2
2
µA
IINSD
Output Temperature Coefficient
Thermal Regulation
Line Regulation
mA
VREF
Quiescent Current
(Ground Current)
Shutdown Supply Current
T yp
VR + 1V ≤ VIN ≤ 6V
mV
40
ppm/°C
0.04
%/W
0.0375
0.35
Notes: 1. Dropout Voltage is defined as the difference between IN and OUT when VR drops 2% below its nominal value.
2. 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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%
2070/71_t02a.eps
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IMP20 70/7 1 , IMP2 1 8 7
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
%
IMP2071
IL = 100µA to 100mA
0.32
2.0
IMP2187
IL = 100µA to 150mA
0.32
3.0
Parameter
Min
Symbol Conditions
Load Regulation:
IMP2070
Thermal Shutdown Die
Temperature
150
°C
Thermal Shutdown Hysteresis
12
°C
58
dB
Ripple Rejection
P SRR
VIN ≥ (VO + 1V) ± 0.25V Freq. = 1kHz
CO = 3.3µF ceramic
Freq. = 10kHz
45
Freq. = 1MHz
34
Output Noise
300Hz to 50kHz
IL = 50mA (IMP2070)
IL = 100mA
SHDN Input HIGH Threshold
2.5V ≤ VIN ≤ 6.5V
SHDN Input LOW Threshold
2.5V ≤ VIN ≤ 6.5V
µVRMS
280
% of VIN
45
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
Output Current Limit
Adjust Input Leakage Current
350
IADJ
400
600
50
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mA
pA
Notes: 1. Dropout Voltage is defined as the difference between IN and OUT when VR drops 2% below its nominal value.
2. 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.
4
mV
2070/71_t02b.eps
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IMP20 70/7 1 , IMP2 1 8 7
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)
2070/71_03.eps
Figure 1. IMP2070 PSRR at ILOAD = 100mA
10k
100k
2070/71_04.eps
Figure 2. IMP2070 PSRR at ILOAD = 1mA
Enable
0V
∆VIN = 1V
5V/DIV
Output
VOUT
50mV/DIV
0V
1V/DIV
20µs/DIV
100µs/DIV
2070/71_15.eps
2070/71_13.eps
Figure 3. Line Transient Response
Load
Pulse
Figure 4. Enable Input Response
Load
Pulse
20mA/DIV
50mA/DIV
VOUT
VOUT
25mV/DIV
25mV/DIV
50µs/DIV
50µs/DIV
2070/71_09.eps
Figure 5. Load Transient Response (50mA Step)
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2070/71_10.eps
Figure 6. Load Transient Response (100mA Step)
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IMP20 70/7 1 , IMP2 1 8 7
Typical Characteristics
100mA/DIV
100ms/DIV
2070/71_11.eps
Figure 7. Output Current Limit
Application Information
The IMP2070, IMP2071 and IMP2187 have been designed to offer
exceptionally low dropout voltage, adjustable outputs, 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.
Output Capacitor
The IMP2070, IMP2071 and IMP2187 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.
If the shutdown mode is not needed, SHDN should be connected
directly to the regulator input voltage pin.
1
Output Voltage Adjustment
+
Adjust Input
3.0V
+ C1
1µF
The output voltage setting is determined by the values of R1 and
R2 (Figure 8). These resistors should be between 470kΩ and 3MΩ
to minimize current.
The output voltage setting is calculated using the following
equation.
R1 
VOUT = V REF ×  1 +
R2 

VIN
VOUT
IMP2070
IMP2071
IMP2187
ADJ
3
Shutdown Control
(from Power
Control Logic)
SHDN
GND
2
5
+2.45V
+
C2
1µF
R1
470k
4
C3
100pF
to
0.01µF
(Optional)
R2
470k
2070/71_12.eps
The voltage adjustment range of the IMP2070, IMP2071, and
IMP2187 is from VREF to (VIN –0.05V). A small capacitor (100pF
to 0.01µF) may be added to the ADJ input to further reduce
output noise. A typical 2.45V battery operated supply is shown in
Figure 8.
6
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Figure 8. 2.45 Battery-Operated Supply
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IMP20 70/7 1 , IMP2 1 8 7
Package Dimensions
Plastic SOT-23A (5-Pin)
Millimeters
Inches
Min
Nominal
0.037
0.001
0.035
0.011
0.011
0.003
0.003
0.109
0.101
0.058
—
—
0.044
—
0.015
—
0.003
0.113
—
0.062
Max
Min
Nominal
Max
—
—
1.15
—
0.40
—
0.10
2.90
—
1.60
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)*
A
A1
A2
b
b1
c
c1
D
E
E1
D
e1
E1
e
A A2
E
b
C
∅
e
0.037 BSC
0.95 BSC
0.074 BSC
1.90 BSC
L1
0.013
L1
L
SOT-23A (5-Pin).eps
0.95
0.05
0.90
0.30
0.30
0.08
0.08
2.80
2.60
1.50
e1
L
A1
0.057
0.005
0.050
0.019
0.017
0.007
0.062
0.117
0.117
0.066
∅
0.017
0.021
0.35
0.002 REF
0°
—
0.45
0.55
0.60 REF
8°
0°
—
8°
* JEDEC Drawing MO-178
* Add /T to Part Number for Tape and Reel
2070/71_t04.eps
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www.ds-imp.com.cn
7
IMP20 70/7 1 , IMP2 1 8 7
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