TS1935B Ver la hoja de datos (PDF) - TSC Corporation
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TS1935B Datasheet PDF : 6 Pages
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Preliminary
TS1935B
1.9A / 1.2MHz Boost DC to Dc Converter
Electrical Specifications (Ta = 25oC, VIN=5V, EN=VIN, IL=0A unless otherwise noted)
Characteristics
Symbol
Conditions
Min Typ Max Units
Input Voltage range
Under Voltage Lockout
VCC
UVLO Rising
2.6
--
5.5
V
-- 2.35 2.60 V
UVLO Hysteresis
-- -130 --
mV
Step-Up Voltage Adjust Range
Operating quiescent current
Shutdown current
Feedback Voltage
FB Input Leakage Current
Line Regulation
Load Regulation
Switching frequency
Maximum Duty
N-channel MOSFET
current limit
MOSFET on-resistance
(Note 1)
SW Leakage Current
EN high-level input voltage
EN low-level input voltage
EN Hysteresis
VOUT
ICCQ
ISD
VFB
IFB-LKG
FOSC
DMAX
IOUT= 0mA, VFB =1.5V
VEN=0V
VFB = 1.3V
VIN = 2.5 to 5.5V
IOUT = 20mA
VIN = 5V
IOUT = 1mA to 400mA
ILIM Duty=50%
RDS(on)
ISWL
VIH
VIL
hys
VCC=3V, ISW=1A
VCC=5V, ISW=1A
VLX = 27V, VFB =1.5V
3
--
27
V
-- 150 250 µA
--
0.1
1
µA
1.213 1.238 1.263 V
-100 0.01 +100 nA
--
0.2
--
%
-
0.2
--
%
900 1200 1500 KHz
82
87
-
%
--
1.9
--
A
--
650
-
mΩ
-- 500 --
--
--
1
µA
1.0
--
--
V
--
--
0.4
V
-- 200
-
mV
EN input leakage current
Thermal Shutdown
Thermal Shutdown Hysteresis
Note 1: Guaranteed by design
IEN-LKG
TDS
TSH
VEN=GND or VCC
-- 0.01 0.1 µA
-- 150 --
°C
--
35
--
Pin Description
Pin Number Pin Name
1
SW
2
GND
3
FB
4
EN
5
VCC
Description
Power Switch Output.
SW is the drain of the internal MOSFET switch. Connect the power inductor and
output rectifier to SW. SW can swing between GND and 27V.
Ground. Tie directly to ground plan.
Feedback Input.
FB voltage is 1.238V. Connect a resistor divider to FB.
Regulator On/Off Control Input.
A high input at EN turns on the converter, and a low input turns it off.
When not used, connect EN to the input source for automatic startup.
The EN pin cannot be left floating.
Input Supply Pin.
Must be locally bypassed.
2/6
Version: Preliminary
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