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
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.
APPLICATIONS
LCD Bias
Hand-Held Computers
Battery Backup
Digital Still Cameras
TYPICAL APPLICATION CIRCUIT
V
IN
2.5V~5V
C1
4.7µF
5
4
L1
22µH
VIN
SW
1
C3
0.22µF
L2
22µH
D1
RB521S-30
R1
150k
V
OUT
-6V/14mA
C2
4.7µF
SHDN
3
2
GND NFB
AIC1653
R2
39K
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
1
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
5
4
1
2
3
SOT-23-5 Marking
Part No.
AIC1653
Marking
1653
ABSOLUTE MAXIMUM RATINGS
VIN, SHDN Voltage
SW Voltage
NFB Voltage
Junction Temperature
Operating Temperature Range (Note 2)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
(Note 1)
10V
30V
-3V
125°C
-40°C to 85°C
-65°C to 150°C
300°C
TEST CIRCUIT
Refer to Typical Application Circuit.
2
AIC1653
ELECTRICAL CHARACTERISTICS
otherwise specified)
PARAMETER
Minimum Input Voltage
Quiescent Current
FB Comparator Trip Point
FB Comparator Hysteresis
Output Voltage Line Regulation (Note
3)
FB Pin Bias Current (Note 4)
Switch Off Time
Inter Switch On-Resistance
Switch Current Limit
SHDN
Input Voltage High
SHDN
Input Voltage Low
(T
A
= 25°C, V
IN
= 3.6V, V
SHDN
= 3.6V unless
MIN.
TYP.
15
-1.205
-1.23
10
MAX.
1.8
20
1
-1.255
UNIT
V
µA
V
mV
%/V
2.7
µA
nS
nS
1.4
125
0.25
Ω
mA
V
V
µA
0.01
5
TEST CONDITIONS
Not Switching
V
SHDN
= 0V
Refer to Fig.7
V
NFB
= –1.23V
NFB≤-1V
NFB≥-0.6V
0.6
75
0.9
Switch Off, V
SW
= 5V
1.3
0.05
2
400
800
1
100
Switch Leakage Current
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.
3
AIC1653
TYPICAL PERFORMANCE CHARACTERISTICS
80
75
70
-1.25
5
FB Comparator Trip Point (V)
V
IN
=3.6V
4
-1.24
Efficiency (%)
V
IN
=2.7V
65
Voltage
3
-1.23
60
55
50
45
2
V
IN
=4.2V
Current
2
-1.22
-1.21
1
4
6
8
10
12
14
16
-1.20
-40
-20
0
20
40
60
80
0
100
Load Current (mA)
Fig. 1 Load Current vs. Efficiency
(Refer to typical application circuit)
1.5
Temperature (°C)
Fig. 2 FB Comparator Trip Point and Pin Bias
Current vs. Temperature
140
V
IN
=2.5V
Switch Current Limit (mA)
120
100
80
60
40
20
0
-40
Switch ON-Resistance (Ω)
V
IN
=3.6V
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-40
V
IN
=3.6V,
I
SWITCH
=50mA
V
IN
=4.2V
V
IN
=8.5V
V
IN
=10V
-20
0
20
40
60
80
100
-20
0
20
40
60
80
100
Temperature (°C)
Fig. 3 Switch Current Limit vs. Temperature
Temperature (°C)
Fig. 4 Switch ON-Resistance vs. Temperature
Bias Current (µA)
4
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