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參數(shù)資料
| 型號(hào)： | TK65020 |
| 廠商： | TOKO Inc. |
| 英文描述： | STEP-UP VOLTAGE CONVERTER |
| 中文描述： | 升壓電壓轉(zhuǎn)換器， |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 94K |
| 代理商： | TK65020 |
ADVANCED INFORMATION
January 1999 TOKO, Inc.
Page 1
TK65020
VIN
GND
SW
NC
VOUT
CIRCUIT
OSCILLATOR
Vref
UVLO
BLOCK DIAGRAM
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Tape/Reel Code
TK65020MTL
DESCRIPTION
The TK65020 low power step-up DC-DC converter is
designed for portable battery-powered systems, capable
of operating from a single battery cell down to 0.9 V. The
TK65020 provides the power switch and the control circuit
for a boost converter. The converter takes a DC input and
boosts it up to a regulated 2.5 V output .
The output voltage is laser-trimmed. An internal
Undervoltage Lockout (UVLO) circuit is utilized to prevent
the inductor switch from remaining in the “on” mode when
the battery voltage is too low to permit normal operation.
Pulse Burst Modulation (PBM) is used to regulate the
voltage at the V
OUT
pin of the IC. PBM is the process in
which an oscillator signal is gated or not gated to the switch
drive each period. The decision is made just before the
start of each cycle and is based on comparing the output
voltage to an internally-generated bandgap reference.
The decision is latched, so the duty ratio is not modulated
within a cycle. The average duty ratio is effectively
modulated by the “bursting” and skipping of pulses which
can be seen at the SW pin of the IC. Special care has been
taken to achieve reliability through the use of Oxide,
double Nitride passivation. The TK65020 is available in a
miniature 6-pin SOT-23L-6 surface mount package.
For other output levels, please refer to the TK651xx and
TK652xx Toko series of step-up converters.
ADVANCED
INFORMATION
FEATURES
TK65020
GND
VIN
VOUT
NC
SW
GND
20P
I
Guaranteed 0.9 V Operation
I
Very Low Quiescent Current
I
Internal Bandgap Reference
I
High Efficiency MOS Switching
I
Low Output Ripple
I
Laser-Trimmed Output Voltage
I
Laser-Trimmed Oscillator
I
Undervoltage Lockout
I
Regulation by Pulse Burst Modulation (PBM)
APPLICATIONS
I
Battery Powered Systems
I
Cellular Telephones
I
Pagers
I
Personal Communications Equipment
I
Portable Instrumentation
I
Portable Consumer Equipment
I
Radio Control Systems
STEP-UP VOLTAGE CONVERTER
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相關(guān)代理商/技術(shù)參數(shù) |
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| TK65020MTL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER |
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| TK65025M | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| TK65025MBX | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
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