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
D1
RB521S-30
R1
150k
L2
22µH
V
OUT
-6V/14mA
SHDN
3
2
GND NFB
AIC1653
C2
4.7µF
R2
39K
L1,L2: TOKO D312F 22µH
D1: Rohm RB521S-30
C1,C2,C3: TAIYO YUDEN Ceramic capacitors
Analog Integrations Corporation
Si-Soft Research Centern
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1653G-01 122608
1
AIC1653
ORDERING INFORMATION
AIC1653XXXX
PACKING TYPE
TR: TAPE & REEL
BG: BAG
PACKAGE TYPE
V: SOT-23-5
C: Commercial
P: Lead free Commercial
G: Green Package
Example: AIC1653CVTR
in SOT-23-5 Package & Tape & Reel
Packing Type
PIN CONFIGURATION
SOT-23-5
FRONT VIEW
1: SW
2: GND
3: NFB
4. SHDN
5: VIN
5
4
1
2
3
SOT-23-5 Marking
Part No.
AIC1653
AIC1653P
AIC1653G
Marking
1653
1653P
1653G
ABSOLUTE MAXIMUM RATINGS
VIN, SHDN Voltage
SW Voltage
NFB Voltage
Junction Temperature
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
10V
30V
-3V
125°
C
-40°C~85°C
-65°C ~ 150°C
260°C
Absolute Maximum Ratings are those values beyond which the life of a device may be
impaired.
2
AIC1653
ELECTRICAL CHARACTERISTICS
otherwise specified.) (Note 1)
PARAMETER
Minimum Input Voltage
Quiescent Current
FB Comparator Trip Point
FB Comparator Hysteresis
Output Voltage Line Regulation
(Note 2)
FB Pin Bias Current (Note 3)
Switch Off Time
Inter Switch On-Resistance
Switch Current Limit
Refer to Fig.7
V
NFB
= -1.23V
NFB≤ -1V
NFB≥ -0.6V
Not Switching
V
SHDN
= 0V
(T
A
= 25° V
IN
= 3.6V, V
SHDN
= 3.6V unless
C,
MIN.
TYP.
15
-1.205
-1.23
10
0.05
1.3
2
400
800
0.6
75
0.9
0.25
1
100
1.4
125
2.7
MAX.
1.8
20
1
-1.255
UNIT
V
µA
V
mV
%/V
µA
nS
nS
Ω
mA
V
V
µA
0.01
5
TEST CONDITIONS
SHDN
Input Voltage High
SHDN
Input Voltage Low
Switch Leakage Current
Switch Off, V
SW
= 5V
Note 1: Specifications are production tested at T
A
=25°C. Specifications over the -40°C to 85°C operating
temperature range are assured by design, characterization and correlation with Statistical Quality
Controls (SQC).
Note 2: Output voltage line regulation is guaranteed by design, characterization and correlation with statistical
quality controls, not production tested.
Note 3: 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
140
Temperature (°C)
Fig. 2 FB Comparator Trip Point and Pin Bias
Current vs. Temperature
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
AIC1653
TYPICAL PERFORMANCE CHARACTERISTICS
850
800
-40
-20
0
(Continued)
20
40
60
80
100
Temperature (
°
C)
24
V
IN
=3.6V
Supply Current (uA)
Phase I
V
IN
=1.8V to 12V,
22
20
18
16
14
12
60
80
100
10
2
4
6
8
10
12
Switch Off Time (ns)
750
700
650
600
550
500
450
400
-40
-
20
0
Temperature = 20
°
C
Temperature=-40
°
C to 100
°
C,
V
IN
=3.6V
Phase II
20
40
Temperature (
°
C)
Fig. 5 Switch Off Time vs. Temperature
7.0
6.8
6.6
Supply Voltage (V)
Fig. 6 Quiescent Current vs. Temperature and Voltage
Output Voltage (V)
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
2
3
4
5
6
7
8
9
10
V
OUT
= - 6.0V,
I
OUT
=2mA
Input Voltage (V)
Fig. 7 Line Regulation
5
