AIC1653 Datasheet PDF - Analog Intergrations Corporation

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AIC1653
Analog Intergrations Corporation

Part Number AIC1653
Description Micropower Inverting DC/DC Converter
Page 11 Pages


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AIC1653
Micropower Inverting DC/DC Converter in SOT-23-5
FEATURES
Low Quiescent Current:
15µA in Active Mode
<1µA in Shutdown Mode
Operates with VIN as Low as 1.8V
Uses Small Surface Mount Components
High Output Voltage: Up to -28V
Low profile 5-Lead SOT-23-5 Package
APPLICATIONS
LCD Bias
Hand-Held Computers
Battery Backup
Digital Still Cameras
DESCRIPTION
The AIC1653 is a micropower inverting DC/DC
converter in 5-lead SOT-23 package. It is designed
for power systems with a 100mA current limit and
an input voltage ranging from 1.8V to 10V. Besides,
AIC1653 features a quiescent current of only 15µA
at no load, which further reduces to 0.5µA when
shutdown. The schemes of current limited and
fixed off-time control conserve operating current,
resulting in high efficiency over a broad range of
load current. In addition, the 30V switch of
AIC1653 allows high voltage outputs up to -28V,
which is easily generated without the use of costly
transformers. The AIC1653’s low off-time of 400ns
permits the use of tiny, low profile inductors and
capacitors to minimize footprint and cost in
space-conscious portable applications.
TYPICAL APPLICATION CIRCUIT
VIN
2.5V~5V
C1
4.7µF
L1
22µH
5 VIN
1
SW
4 SHDN
2 GND NFB 3
AIC1653
C3
0.22µF
L2
22µH
D1 R1
RB521S-30 150k
R2
39K
VOUT
-6V/14mA
C2
4.7µF
L1,L2: TOKO D312F 22µH
D1: Rohm RB521S-30
C1,C2,C3: TAIYO YUDEN Ceramic capacitors
Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510 www.analog.com.tw
DS-1653-02 122203
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AIC1653
ORDERING INFORMATION
AIC1653CXXX
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
V: SOT-23-5
Example: AIC1653CVTR
in SOT-23-5 Package & Tape & Reel
Packing Type
PIN CONFIGURATION
SOT-23-5 (CV)
FRONT VIEW
1: SW
2: GND
3: NFB
4. SHDN
5: VIN
54
12 3
SOT-23-5 Marking
Part No.
AIC1653
Marking
1653
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN, SHDN Voltage
SW Voltage
NFB Voltage
Junction Temperature
Operating Temperature Range (Note 2)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
10V
30V
-3V
125°C
-40°C to 85°C
-65°C to 150°C
300°C
TEST CIRCUIT
Refer to Typical Application Circuit.
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AIC1653
ELECTRICAL CHARACTERISTICS (TA = 25°C, VIN = 3.6V, V SHDN = 3.6V unless
otherwise specified)
PARAMETER
TEST CONDITIONS
MIN. TYP. MAX. UNIT
Minimum Input Voltage
1.8 V
Quiescent Current
FB Comparator Trip Point
Not Switching
VSHDN = 0V
-1.205
15
-1.23
20
1
-1.255
µA
V
FB Comparator Hysteresis
10 mV
Output Voltage Line Regulation (Note Refer to Fig.7
3)
0.05 %/V
FB Pin Bias Current (Note 4)
VNFB = –1.23V
1.3 2 2.7 µA
Switch Off Time
NFB-1V
NFB-0.6V
400 nS
800 nS
Inter Switch On-Resistance
0.6 1 1.4
Switch Current Limit
75 100 125 mA
SHDN Input Voltage High
0.9 V
SHDN Input Voltage Low
0.25 V
Switch Leakage Current
Switch Off, VSW = 5V
0.01 5
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
Note 2: Specifications over the -40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 3: Output voltage line regulation is guaranteed by design, characterization and correlation with
statistical quality controls, not production tested.
Note 4: Bias current flows out of the NFB pin.
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AIC1653
TYPICAL PERFORMANCE CHARACTERISTICS
80
75
70
VIN=2.7V
65
60 VIN =4.2V
55
50
-1.25
VIN=3.6V
-1.24
-1.23
-1.22
-1.21
Voltage
Current
5
4
3
2
1
45
-1.20
0
2 4 6 8 10 12 14 16
-40 -20
0
20 40 60 80 100
Load Current (mA)
Temperature (°C)
Fig. 1 Load Current vs. Efficiency
Fig. 2 FB Comparator Trip Point and Pin Bias
(Refer to typical application circuit)
Current vs. Temperature
140 VIN=2.5V
120
VIN =3.6V
100
80 VIN=4.2V VIN =8.5V
60
VIN =10V
40
20
0
-40 -20
0
20 40 60 80 100
Temperature (°C)
Fig. 3 Switch Current Limit vs. Temperature
1.5
1.4 VIN=3.6V,
1.3 ISWITCH=50mA
1.2
1.1
1.0
0.9
0.8
0.7
-40
-20
0
20 40 60 80 100
Temperature (°C)
Fig. 4 Switch ON-Resistance vs. Temperature
4



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