BOOST REGULATOR. GL5050 Datasheet

GL5050 REGULATOR. Datasheet pdf. Equivalent


Gleam GL5050
Gleam
Power Management
GL5050
500mA 500KHz DC-DC CONVERTOR BOOST REGULATOR
Description
The GL5050 are high-efficiency, CMOS, step-up, DC-DC
switching regulators for small, low input volt-age or battery-
powered systems. The GL5050 accept a positive input volt-
age between 0.9V and VOUT and convert it to a higher, pin-
selectable output voltage 5V. The GL5050 adjustable ver-
sions accept 0.9V to 5.0V input voltages. Typical efficien-
cies are greater than 80%. The GL5050 combine ultra-low
quiescent supply current and high efficiency to give maxi-
mum battery life. An internal MOSFET power transistor per-
mits high switching frequencies. This benefit, combined
with internally set peak inductor current limits, permits the
use of small, low-costinductors. The GL5050 have a
500mA peak inductor current limit.
Features
0.9V to 5.0V Input Supply Voltage
0.9V Typ Start-Up Supply Voltage
80% Efficiency at 100mA
10uA Shutdown Mode
500mA Switch-Current Limit
Low-Battery Detector (LBI/LBO)
Monolithic CMOS Design
Application
3.3V to 5V Step-Up Conversion
Palmtop Computers
Medical Instrumentation
Glucose Meters
Portable Data-Collection Equipment
Personal Data Communicators/Computers
2-Cell & 3-Cell Battery-Operated Equipment
TYPICAL APPLICATIONS
0.1uF
1 EN
LX 8
2 NC
GND 7
GL5050
3C
VOUT 6
4 LBO
LBI 5
Schottky Diode
22uH
Vin
68uF
VOUT
68uF
http://www.gleammicro.com 1


GL5050 Datasheet
Recommendation GL5050 Datasheet
Part GL5050
Description 500mA 500KHz DC-DC CONVERTOR BOOST REGULATOR
Feature GL5050; Gleam Power Management GL5050 500mA 500KHz DC-DC CONVERTOR BOOST REGULATOR Description The GL5050 .
Manufacture Gleam
Datasheet
Download GL5050 Datasheet




Gleam GL5050
Gleam
Power Management
GL5050
500mA 500KHz DC-DC CONVERTOR BOOST REGULATOR
MARKING INFORMATION & PIN CONFIGURATIONS
SOP- 8
GND
LX
8765
VOUT
LBI
GL5050
VVAYYWW
1234
EN LBO
NC C
V V / VVV= Output Voltage
(50=5.0V , 120=12V, A=Adj)
A = Assembly Location
YY = Year
W W = Weekly
ORDERING INFORMATION (Green Package Products are available now!)
Ordering Number
Output Voltage
GL5050-AS8R
GL5050-3.3S8R
GL5050-5.0S8R
ADJ
3.3
5.0
* For detail Ordering Number identification, please see last page.
Package
SOP-8
SOP-8
SOP-8
Shipping
2500 Units / Reel
2500 Units / Reel
2500 Units / Reel
PIN DESCRIPTION
PIN NUMBER PIN SYMBOL
FUNCTION
1 EN Shutdown Input. When low, the entire circuit is off.
2 NC Not connected
3 C Extermal capacity pin.
4
LBO
Low-Battery output (an open-drain N-channet MOSFET sinks current when the voltage
at LBI drops below 1.25V).
5 LBI Low0Battery input
6 VOUT Supply voltage.
7
GND
Ground
28
LX N-channel Power MOSFET drain.



Gleam GL5050
Power Management
Gleam
GL5050
500mA 500KHz DC-DC CONVERTOR BOOST REGULATOR
ABSOLUTE MAXIMUM RATINGS
Rating
Supply Voltage (OUT to GND)
Switch Voltage (LX to GND)
EN , LBO to GND
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C)
Storage Temperature Range
Maximum Junction Temperature
Lead Temperature (Soldering, 10 sec.)
Value
+7.0
+7.0
+7.0
471
-65 to + 150
+150
+260
Unit
V
V
V
mW
°C
°C
°C
Lead Temperature
S Package
Vapor Phase (60 secretary.)
Infrared (10 secretary.)
+215
+245
°C
OPERATING CONDITIONS
Rating
Temperature Range
Supply Voltage
BLOCK DIAGRAM
EN
Minimum
On-Time
One-Shot
Q
TRIG
One-Shot
F/F
SQ
R
GL5050
Maximum
On-Time
One-shot
TRIG
Q
One-Shot
Current-Limit
Comparator
LBO
LBI
N Channel
Error Comparator
LBI Comparator
Value
- 40 TJ +125
5.0
N Channel
LX
GND
VOUT
Reference
C
Unit
°C
V
3







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