LTC1522CS8 Linear Technology, LTC1522CS8 Datasheet

IC DC/DC CONV 5V CHRG PMP 8-SOIC

LTC1522CS8

Manufacturer Part Number
LTC1522CS8
Description
IC DC/DC CONV 5V CHRG PMP 8-SOIC
Manufacturer
Linear Technology
Type
Switched Capacitor (Charge Pump)r
Datasheet

Specifications of LTC1522CS8

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
20mA
Frequency - Switching
700kHz
Voltage - Input
2.7 ~ 5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1522CS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC1522CS8
Manufacturer:
LT/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL
SIM Interface Supplies for GSM Cellular Telephones
Li-Ion Battery Backup Supplies
Local 3V to 5V Conversion
Smart Card Readers
PCMCIA Local 5V Supplies
Ultralow Power: Typical Operating I
Short-Circuit/Thermal Protected
Regulated 5V 4% Output Voltage
2.7V to 5V Input Range
No Inductors
Very Low I
Output Current: 10mA (V
Shutdown Disconnects Load from V
Internal Oscillator: 700kHz
Compact Application Circuit (< 0.1 in
8-Pin MSOP and SO Packages
2.7V TO 5V
Regulated 5V Output from a 2.7V to 5V Input
V
IN
+
CC
APPLICATION
in Shutdown: < 1 A
10 F
+
20mA (V
U
10 F
V
I
I
OUT
OUT
OUT
= 0mA TO 10mA, V
= 0mA TO 20mA, V
= 5V 4%
1
2
3
4
IN
IN
NC
V
V
C
IN
OUT
+
LTC1522
2.7V)
3V)
0.22 F
U
IN
IN
SHDN
GND
IN
NC
C
2.7V
3V
2
CC
)
8
7
6
5
= 6 A
ON/OFF
1522 TA01
The LTC
converter that produces a regulated 5V output from a 2.7V
to 5V input supply. Extremely low supply current (6 A
typical with no load, < 1 A in shutdown) and low external
parts count (one 0.22 F flying capacitor and two 10 F
capacitors at V
suited for small, light load battery-powered applications.
Typical efficiency (V
currents between 50 A and 20mA. Modulating the SHDN
pin keeps the typical efficiency above 75% with load
currents all the way down to 10 A.
The LTC1522 has thermal shutdown and can survive a
continuous short from V
load is disconnected from V
8-pin MSOP and SO packages. The LTC1522 is pin
compatible with the LTC1516 in applications where
V
DESCRIPTION
IN
, LTC and LT are registered trademarks of Linear Technology Corporation.
Micropower, Regulated
2.7V and I
®
1522 is a micropower charge pump DC/DC
90
80
70
60
50
0.01
V
IN
IN
Efficiency vs Output Current
SHDN = 0V
OUT
= 3V
DC/DC Converter
and V
5V Charge Pump
U
0.1
IN
OUTPUT CURRENT (mA)
LOW I
(SEE FIGURE 2)
20mA.
OUT
= 3V) exceeds 75% with load
OUT
Q
MODE
) make the LTC1522 ideally
1
IN
to GND. In shutdown the
. The part is available in
10
1522 TA02
LTC1522
100
1

Related parts for LTC1522CS8

LTC1522CS8 Summary of contents

Page 1

... A. The LTC1522 has thermal shutdown and can survive a continuous short from V load is disconnected from V 8-pin MSOP and SO packages. The LTC1522 is pin compatible with the LTC1516 in applications where V 2.7V and LTC and LT are registered trademarks of Linear Technology Corporation SHDN ON/OFF 6 GND 5 – ...

Page 2

... Note 2: C grade device specifications are guaranteed over the temperature range. In addition, C grade device specifications are assured over the – temperature range by design or correlation, but are not production tested. ORDER PART TOP VIEW NUMBER 8 NC LTC1522CS8 7 SHDN 6 GND – PART MARKING ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage vs Input Voltage 5. 10mA OUT OUT 5. 4.95 4.90 ...

Page 4

LTC1522 W BLOCK DIAGRAM S1A + C C FLY 0.22 F – C S1B CHARGE PUMP CHARGE PUMP SHOWN IN DISCHARGE CYCLE U U APPLICATIONS INFORMATION Operation The LTC1522 uses a switched capacitor ...

Page 5

U U APPLICATIONS INFORMATION A ceramic capacitor is recommended for the flying capaci- tor with a value in the range of 0 0.22 F. Note that a large value flying cap (> 0.22 F) will increase output ripple ...

Page 6

LTC1522 U U APPLICATIONS INFORMATION 2. LTC1522 OUT + 0. OUT 5V 4% Figure 2. Ultralow Quiescent Current (<2.1 ...

Page 7

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 8

... Conversion with Low Voltage Loss TRUTH TABLE NOT USED SHUTDOWN (SEE TRUTH TABLE BAS70- Si6943DQ V CC RST CLK SIM CARD I/O GND 1522 TA03 is Fixed or Adjustable 50mA OUT OUT 2V 50mA (V 3V) IN OUT IN 1522f LT/TP 0198 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1997 ...

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