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參數(shù)資料
| 型號： | LT1106 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory |
| 中文描述： | 微功率升壓直流/直流轉(zhuǎn)換器PCMCIA卡閃存記憶體 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 223K |
| 代理商： | LT1106 |
6
LT1106
BLOCK DIAGRAW
–
+
–
+
V
REF
V
CC
17
VPP2
20
BIAS
ON/0FF
16
14
G1
15
G2
18
VPP1
AVPP
19
12/5
SELECT
1
565k
299k
4k
200k
VPP VALID
OFF
Q3
Q2
1
×
Q1
50
×
100k
–
+
C2
V
REF
1.24V
R1
3
–
+
C3
36mV
–
V
CC
3,4
PGND
LT1106 BD
SW
R2
700
13
GND
6,7
9,10,11
2
SOFT START
BIAS
+
500kHz
OSCILLATOR
–
+
C1
5
3/5
V
CC
3.7V
–
+
APPLICATIO
S I
N
FOR
ATIO
U
Functional Description
The LT1106 is a micropower, step-up DC/DC converter
specifically configured for PCMCIA flash memory card
VPP generation. The device generates a 5V or 12V output
selectable via the 12/5 Select pin. If 12V is present on
either the VPP1 or VPP2 pins, gate drive outputs G1 and
G2 are driven low, turning on external PMOS devices. The
switching regulator inside the LT1106 is idled when 12V
is present on VPP1 or VPP2.
The VPP VALID output goes low when the voltage at AVPP
exceeds 11.4V This signal can be used to indicate pres-
ence of a valid programming voltage. The 3/5 comparator
indicates whether the input voltage is 3.3V or 5V.
W
U
The Soft Start pin can be used to limit inrush current upon
start-up. A 0.1
μ
F capacitor in parallel with a 1M resistor is
connected between this pin and ground to limit peak
inductor current at start-up.
Switching Regulator Operation
When 12V is not present on the VPP1 or VPP2 pins and the
device is enabled (ON/OFF = 1), the LT1106 generates a
regulated voltage at the AVPP pin. This voltage is pro-
grammable between 5V or 12V depending on the state of
the 12/5 Select pin. Referring to the block diagram, hyster-
etic comparator C1 monitors AVPP via the resistor divider.
When the negative input of C2 falls below 1.24V, C1’s
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1106_02 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory |
| LT1106CF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory |
| LT1107 | 制造商: 功能描述: |
| LT1107_02 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower DC/DC Converter Adjustable and Fixed 5V, 12V |
| LT1107-12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower DC/DC Converter Adjustable and Fixed 5V, 12V |
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