Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UC2306
LINEAR INTEGRATED CIRCUIT
MICROPOWER DC/DC
CONVERTERS WITH
LOW-BATTERY DETECTOR
ACTIVE IN SHUTDOWN

DIP-8
DESCRIPTION
The UTC UC2306 is a step-up DC/DC converter which
operate from a wide input supply range of 1.5V to 8V. Its
peak switch current can be reduced by adding a single
resistor at the ILIM pin. It is an ideal for use in small, low
voltage, battery-operated systems.

SOP-8
FEATURES
*In shutdown mode:10μA quiescent current.
*Low battery detector active
*Minimum Operating Voltage: 1.5V
*Very Low VCESAT: [email protected] (typ).
*In active mode :120μA quiescent current.
*Only by one resistor: peak current is programmable.

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC2306L-xx-D08-T
UC2306G-xx-D08-T
UC2306L-xx-S08-T
UC2306G-xx-S08-T
UC2306L-xx-S08-R
UC2306G-xx-S08-R
UC2306L-xx-D08-T
Package
Packing
DIP-8
SOP-8
SOP-8
Tube
Tube
Tape Reel
(1)Packing Type
(1) T: Tube, R: Tape Reel
(2)Package Type
(2) D08: DIP-8, S08: SOP-8
(3)Voltage Code
(3) xx: refer to Output Voltage Code
(4)Lead Plating
(4) L: Lead Free, G: Halogen Free
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 12
QW-R103-029.C
UC2306



LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
DIP-8
SOP-8
33: 3.3V
50: 5.0V
AD: ADJ
MARKING
PIN CONFIGURATION
LBI 1
8
FB(SENSE)
LBO
2
7
SHDN
VIN
3
6
ILIM
SW
4
5
GND
PIN DESCRIPTION
PIN No.
1
2
3
4
5
6
7
8
SYMBOL
DESCRIPTION
Input of Low Battery Detector. Detector output is low when voltage on this pin is less
LBI
than 1.17V.
LBO
Output of Low Battery Detector.
VIN
Input Voltage Supply.
SW
The Collector Pin of Power NPN.
GND
Ground.
Pin For Current Limit Set. Connected to nothing for 1A peak switch current; and
ILIM
connect to a resistor to ground will lower peak current
Input of Shutdown.Held low, then switching regulator is turned off. This Pin should not
SHDN
be float. When SHDN mode is not used, connect it to VIN
This pin connects to the resistor divider. In shutdown mode,the divider is disconnected
FB/SENSE
from it.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAMS
R3
8
FB
ENABLE
A1
TIMERS 6μs ON
1.5μs OFF
+
R4
1.5V
UNDER
VOLTAGE
LOCKOUT
1.24V
VREF
VIN
3
+
DRIVER
VIN
C1
36mV
+
2
1
-
LBI
L1
R1
7.2Ω
A2
LBO
SW
R2
1K
4
+
-
Q1
×200
Q2
×1
A3
1.17V
D1
Q3
BIAS -1V
+
1K
SHUTDOWN
7
SHDN
6
ILIM
5
VOUT
C2
GND
UC2306 Block Diagram.
Note:A3 Remains Alive When Device Is in Shutdown
UC2306-3.3/UC2306-5.0 Block Diagram
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATING
UNIT
Input Voltage
VIN
8
V
SW Voltage
VSW
-0.4 ~ +25
V
FB Voltage(UC2306)
VFB
VIN+0.3
V
ILIM Voltage(UC2306-3.3/UC2306-5.0)
VILIM
5
V
SHDN Voltage
VSHDN
6
V
LBI Voltage
VLBI
VIN
V
LBO Voltage
VLBO
8
V
Maximum Power Dissipation
PD
500
mW
Junction Temperature
TJ
125
C
Operating Temperature
TOPR
-20 ~ +85
C
Storage Temperature
TSTG
-65 ~ +150
C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS (VIN=2V, VSHDN=2V, unless otherwise specified)
PARAMETER
Minimum Operating Voltage
Operating Voltage
Quiescent Current
Quiescent Current In Shutdown
SYMBOL
VCC(MIN)
VIN
V SHDN
IQ
V SHDN
ISD
V SHDN
Comparator Trip Point
FB Pin Bias Current
IFB
Sense Pin Leakage in Shutdown
ILEAK(SD)
Line Regulation
LBI Input Threshold
LBI Bias Current
LBI Input Hysteresis
LBO Output Voltage Low
LBO Output Leakage Current
∆VOUT
VLBI(THR)
ILBI (BIAS)
SHDN Input Voltage
ILBI (HYS)
VLBO(OL)
ILBO(LEAK)
High
Low
V
SHDN
SHDN Pin Bias Current
I SHDN
Switching Off Time
Switch On Time
Maximum Duty Cycle
tOFF
tON
tDUTY
TEST CONDITIONS
MIN
=2V, Not switching(Note)
=0V, VIN=2V(Note)
=0V, VIN=5V(Note)
(Note)
(Note)
V SHDN =0V, Fixed Output
Versions(Note)
1.8V≤VIN≤8V (Note)
Falling Edge(Note)
(Note)
(Note)
ISINK=500µA(Note)
LBI=1.5V, LBO=5V(Note)
(Note)
(Note)
V SHDN =5V(Note)
V SHDN =0V(Note)
1.22
1.10
www.unisonic.com.tw
120
7
27
1.24
10
MAX
1.65
8
200
15
50
1.26
25
UNIT
V
V
µA
µA
µA
V
nA
0.002
1
µA
0.04
1.17
6
35
0.2
0.01
0.15
1.25
20
65
0.4
0.1
%/V
V
nA
mV
V
µA
V
V
µA
µA
µs
µs
%
A
mA
V
V
µA
1.4
-5
1
4
76
0.8
(Note)
Current Limit Not Asserted (Note)
Current Limit Not Asserted (Note)
ILIM Pin Open, VIN=5V
Peak Switch Current
I (SW)
20K from ILIM to GND
Isw=1A
Switch Saturation Voltage
VSW(SAT)
Isw=700mA(Note)
Switch Leakage
ILEAK(SW) Switch off, Vsw=5V
Note: Denotes specifications which apply over the 0C to 70C operating temperature range.
UNISONIC TECHNOLOGIES CO., LTD
TYP
1.5
5
-2
1.5
6
80
1
500
0.37
0.26
0.01
0.4
8
2
8
88
1.2
0.35
7
4 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
Super Burst Low IQ DC/DC Converter
MBRS130L
33 μ H
IQ ≈ 10μA
5V
100mA
0.01μF
200K
47K
V IN
2 CELLS
SW
LBO
+
3.83M
(1%metal film)
LBI
UC2306
100 μF
FB
ILIM
SHDN
2N3906
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
1.21M
(1%metal film)
GND
+
220 μ F
22K
47K
5 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION(Cont.)
3.3V SEPIC Efficiency(Step-Up/Step-Down Converter)
MBRS130L
L1A
V IN
2.5V to 8V
+
2
C2
47 μ F
16V
1
V IN
C1
1 μF
L1B*
3
UC2306-3.3
SHUTDOWN
4
SW
3.3V
300mA
SHDN SENSE
GND
I LIM
+
NC
C3
100μF
10V
5V SEPIC (Step-Up/Step-Down Converter)
MBRS130L
L1A
V IN
3V to 8V
2
+
47 μ F
16V
V IN
1
SHDN SENSE
GND
I LIM
NC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4
L1B
SW
UC2306-5.0
SHUTDOWN
C1
1 μF
3
5V
200mA
+
100μF
10V
6 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION(Cont.)
Single Li-lon Cell to 5V Converter with Load Disconnect at VIN<2.7V
22μH
5V
+
100μF
562k
1%
220k
NC
SINGLE
LI-ION
CELL
432k
1%
MBRS130L
V IN
ILIM
SW
SENSE
VOUT
VIN1
VIN2
NC
VINS
VIN3
NC
EN
GND
LBI UC2306-5.0
SHDN
GND LBO
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
VOUT
+
100μF
10V
+
1μF
7 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION(Cont.)
2- TO 4- Cell to 5V Converter with Output Disconnect
2K
ZTX788B
L1
22μH
VIN
MBRS130L
5V
100mA
2V to 6V
VIN
+
47μF
SW
SENSE
UC2306-5.0
SHUTDOWN
SHDN
ILIM
GND
+
+
22μF
220μF
NC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION(Cont.)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Super Burst Efficiency
90
VIN=3V
70
VIN=2V
60
50
40
0.01
0.1
1.0
10
100
Load Current (m)
5V to 12V Converter Efficiency
90
85
Efficiency (%)
Efficiency (%)
80
80
75
70
65
1
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
10
100
Load Current(mA)
300
10 of 12
QW-R103-029.C
UC2306

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Peak Switch Current Limit
Switch Saturation Voltage
500
1.3
TA =25°C
1.2
400
1.1
300
1.0
0.9
200
0.8
100
0
0.7
0
0.2
0.4
0.6
0.8
Switch Current (A)
1.0
1.2
On-and Off-times
8
6
-25
0
25
50
Temperature(°C)
75
100
75
100
Feedback Voltage
1.250
1.245
Maximum OnTime
7
0.6
-50
1.240
1.235
5
1.230
4
1.225
3
1.220
1.215
Off-Time
2
1.210
1
1.205
0
-50
-25
0
25
50
Temperature(°C)
75
100
-25
0
25
50
Temperature(°C)
Feedback Pin Bias Current
20
1.200
-50
Supply Current
300
TA =25°C
18
250
16
14
VSHDN=VN
NOT SWITCHING
200
12
150
10
8
100
6
4
VSHDN= 0 V
50
2
0
-50
-25
0
25
50
75
100
Temperature(°C)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
0
0
1
2
3
4
5
6
7
8
Input Voltage (V)
11 of 12
QW-R103-029.C
UC2306
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
12 of 12
QW-R103-029.C
Similar pages