UNISONIC TECHNOLOGIES CO., LTD
UM601A
LINEAR INTEGRATED CIRCUIT
VOLTAGE AND CURRENT
CONTROLLER

DESCRIPTION
The UTC UM601A integrated circuit incorporates a high stability
series band gap voltage reference, two ORed operational
amplifiers and a current source.
This IC compares the DC voltage and the current level at the
output of a switching power supply to an internal reference. It
provides a feedback through an optocoupler to the PWM controller
IC in the primary side.
The controlled current generator can be used to modify the
level of current limitation by offsetting the information coming from
the current sensing resistor.
It can be used in voltage supervisors, every types of
application requiring a precision voltage regulation and current
limitation, over voltage protection, battery charger with a constant
voltage and a limited output current.

DIP-8
SOP-8
FEATURES
* 1.24V Series Voltage Reference with 10mA Output Current and 1% Precision (UM601A)
* Two Operational Amplifiers with ORed Output and 1MHz Gain Bandwidth Product
* Built-In Current Generator with Enable / Disable Function
* 4.5 ~ 32V Supply Voltage Range

ORDERING INFORMATION
Ordering Number
Lead Free
UM601AG-D08-T
-
Halogen Free
UM601AG-D08-T
UM601AG-S08-R
Package
Packing
DIP-8
SOP-8
Tube
Tape Reel
UM601AL-D08-T

(1) Packing Type
(1) T: Tube, R: Tape Reel
(2) Package Type
(3) Green Package
(2) D08: DIP-8, S08: SOP-8
(3) L: Lead Free, G: Halogen Free and Lead Free
MARKING
DIP-8
8
7
6
5
UTC
UM601A
1
2
3
4
SOP-8
Date Code
L: Lead Free
G: Halogen Free
Lot Code
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 5
QW-R105-028.D
UM601A
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
8
VCC
2
7
VRIN
CRREF
3
6
OUTPUT
GND
4
5
CRIN
-
CSEN
VREF
+
1
+
VREF
-

PIN DESCRIPTION

PIN
1.
NAME
VREF
TYPE
OUTPUT
2.
CSEN
INPUT
3.
4.
5.
CRREF
GND
CRIN
INPUT
INPUT
INPUT
6.
OUTPUT
OUTPUT
7.
8.
VRIN
VCC
INPUT
INPUT
FUNCTION
Voltage Reference Output 1.24V, 10mA max. Do not short circuit
Current source enable input. This current source can be used to offset the
voltage measurement on the sense resistor and therefore to modify the charge
current. The current source is enabled when the input volage on pin 2 is lower
than 0.8V
Current Limitation Reference Input
Ground
Current Limitation Loop Input, connected to the sense resistor
Output pin common to the voltage regulation and current limitation loops. This
output can drive the primary side (LED) of an optocoupler
Voltage Regulation Loop Input
Power Supply Input (4.5 ~ 32VDC)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R105-028.D
UM601A

LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 6
QW-R105-028.D
UM601A

LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
DC Supply Voltage
VCC
36
Output Current
IOUT
20
Input Voltage
VIN
-0.3 ~ VCC-1.5
Input Current
IIN
±1
Power Dissipation
PD
200
Junction Temperature
TJ
150
Storage Temperature
TSTG
-40 ~ +125
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.

OPERATING CONDITIONS
PARAMETER
Supply Voltage
Ambient Operating Temperature

SYMBOL
VCC
TOPR
RATINGS
4.5 ~ 32
-20 ~ +80
UNIT
V
°C
SYMBOL
θJA
RATINGS
130 ~ 200
UNIT
°C/W
THERMAL DATA
PARAMETER
Junction to Ambient

UNIT
V
mA
V
mA
mW
°C
°C
ELECTRICAL CHARACTERISTICS (VCC=15V, TA=25°C, unless otherwise specified)
PARAMETER
Total Supply Current
Input Voltage
Input Offset Voltage
Input Bias Current
Output Sink Current
Large Signal Voltage Gain
Supply Voltage Rejection Ratio
Common Mode Rejection Ratio
Gain Bandwidth Product
Output Leakage Current
VOLTAGE REFERENCE
UM601A-1
Reference Voltage
UM601A-2
Temperature Stability
Load Regulation
Line Regulation
SYMBOL
TEST CONDITIONS
MIN
ICC
VCC=15V
VI
0
TA=25°C
-5
VIO
-7
TMIN.<TAMB.<TMAX.
VIN=1.2V on pin 7
25°C
-700
IIB
and VIN=0V on pin5 TMIN.<TA.<TMAX. -1000
25°C
ISINK
VOL=2.5 V
8
TMIN.<TA.<TMAX.
AVO
RL=2kΩ, TMIN.<TAMB.<TMAX.
15
SVR
TMIN.<TAMB.<TMAX.
65
CMR TMIN.<TAMB.<TMAX.
VCC=15V, F=100kHz, VIN=10mV,
GBP
RL=2kΩ, CL=100pF
TA=25°C
IOH
TMIN.<TAMB.<TMAX.
VREF
KVT
Reglo
Regli
IOUT=1mA, TAMB=25°C
TMIN.<TAMB.<TMAX.
1mA <IOUT<10mA
5V<VIN<32V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TYP
MAX
2
UNIT
mA
V
VCC-1.5
1
5
mV
7
mV
-300
0
nA
0
nA
15
mA
mA
V/mV
90
dB
80
dB
1
MHZ
2
7
μA
μA
1.227 1.240 1.252
V
1.21
1.24
1.27
V
30
100 ppm/°C
5
15
mV
3.5
10
mV
4 of 6
QW-R105-028.D
UM601A

LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
CURRENT GENERATOR
Current Source
Temperature Stability
Line Regulation
Voltage at the enable pin to have
IO=1.4mA
Voltage at the enable pin to have
IO=0mA
Input Current on the Csen pin
Leakage Current
SYMBOL
TEST CONDITIONS
TYP
MAX
UNIT
IO
KCGT
CgliR
TMIN.<TAMB.<TMAX.
4.5V<VCC<32V
1.4
mA
500
ppm/°C
0.003 0.030 mV
VCSEN
TMIN.<TAMB.<TMAX.
0.6
VCSDIS
TMIN.<TAMB.<TMAX.
ICSEN
ICSLEAK
TMIN.<TAMB.<TMAX.
VCS=2V, TMIN.<TAMB.<TMAX.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
2
V
V
0.5
30
2
μA
μA
5 of 6
QW-R105-028.D
UM601A
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
6 of 6
QW-R105-028.D