TD8577 Datasheet PDF - Techcode
| Part Number | TD8577 | |
| Description | 5V 2.1A 1.2MHz Synchronous Boost Converter | |
| Manufacturers | Techcode | |
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There is a preview and TD8577 download ( pdf file ) link at the bottom of this page. Total 19 Pages | ||
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Techcode®
5V 2.1A 1.2MHz Synchronous Boost Converter
DATASHEET
TD8577
General Description
Features
The TD8577 devices provide a power supply solution for
products powered by either a one-cell Li-Ion or Li-polymer, or
a two to three-cell alkaline, NiCd or NiMH battery. The
converter generates a stable output voltage that is adjusted
by an external resistor divider or fixed internally on the chip.
It provides high efficient power conversion and is capable of
delivering output currents up to 1 A at 5 V at a supply voltage
down to 1.8 V. The implemented boost converter is based on
a fixed frequency, pulse-width- modulation (PWM) controller
using a synchronous rectifier to obtain maximum efficiency.
At low load currents the converter enters Power Save mode
to maintain a high efficiency over a wide load current range.
The Power Save mode can be disabled, forcing the converter
to operate at a fixed switching frequency. It can also operate
synchronized to an external clock signal that is applied to the
SYNC pin. the maximum peak current in the boost switch is
limited to a value of 5000 mA.
The converter can be disabled to minimize battery drain.
During shutdown, the load is completely disconnected from
the battery. A low-EMI mode is implemented to reduce
ringing and, in effect, lower
radiated electromagnetic energy when the converter enters
the discontinuous conduction mode. The device is packaged
in a 16-pin QFN package measuring 4 mm x 4 mm (RSA) or in
a 16-pin TSSOP16.or in a DFN3x3-12 packages
92% Efficient Synchronous Boost Converter With
1000-mA Output Current From 1.8-V Input
Device Quiescent Current: 20-μA (Typ)
Input Voltage Range: 1.8-V to 5.5-V
Adjustable Output Voltage Options Up to 5.5-V
Power Save Mode for Improved Efficiency at Low Output
Power
Low Battery Comparator
Low EMI-Converter (Integrated Antiringing Switch)
Load Disconnect During Shutdown
Over-Temperature Protection
Available in a Small 4 mm x 4 mm QFN-16 or in a
TSSOP-16 or in a DFN3*3-12 package
Applications
Power Bank
Tablet
Portable Equiment
October, 20, 2011.
Techcode Semiconductor Limited
1
www.techcodesemi.com
|
| |
 
Techcode®
5V 2.1A 1.2MHz Synchronous Boost Converter
DATASHEET
TD8577
Electrical Characteristics
PARAMETER
TEST CONDITIONS
VI Input voltage range
VO TD8577 output voltage range
VFB TD8577 feedback voltage
f Oscillator frequency
Frequency range for synchronization
Switch current limit
VOUT= 5 V
Start-up current limit
SWN switch on resistance
VOUT= 5 V
SWP switch on resistance
VOUT= 5 V
Total accuracy
Line regulation
Load regulation
Quiescent current
IO = 0 mA, VEN = VBAT = 1.8 V,
VBAT
VOUT =5 V
IO = 0 mA, VEN = VBAT = 1.8 V,
VOUT
VOUT = 5 V
Shutdown current
VEN= 0 V, VBAT = 2.4 V
CONTROL STAGE
PARAMETER
TEST CONDITIONS
VUVLO Under voltage lockout threshold
VLBI voltage decreasing
VIL LBI voltage threshold
VLBI voltage decreasing
LBI input hysteresis
LBI input current
EN = VBAT or GND
LBO output low voltage
VO = 3.3 V, IOI = 100 µA
LBO output low current
LBO output leakage current
VLBO= 7 V
MIN
1.8
1.8
490
900
900
4500
-3%
TYP
500
1200
5000
0.4 x ISW
55
55
10
10
0.1
MIN TYP
1.5
490 500
10
0.01
0.04
100
0.01
EN, SYNC input low voltage
VIL
VIH EN, SYNC input high voltage
EN, SYNC input current
Overtemperature protection
Overtemperature hysteresis
Clamped on GND or VBAT
0.8 × VBAT
0.01
140
20
MAX
5.5
5.5
510
1500
1500
5500
3%
0.6%
0.6%
25
20
1
MAX
510
0.1
0.4
0.1
0.2 ×
VBAT
0.1
UNIT
V
V
mV
kHz
kHz
mA
mA
mΩ
mΩ
µA
µA
µA
UNIT
V
mV
mV
µA
V
µA
µA
V
V
µA
°C
°C
October, 20, 2011.
Techcode Semiconductor Limited
5
www.techcodesemi.com
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TD8577 electronic component. |
| Information | Total 19 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TD8577.PDF Datasheet ] | |
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