LT1610 Datasheet, PDF (1/16 Pages) Linear Technology – 1.7MHz, Single Cell Micropower DC/DC Converter

FEATURES
s _{Uses Tiny Capacitors and Inductor}
s _{Internally Compensated}
s _{Low Quiescent Current: 30µA}
s _{Operates with VIN as Low as 1V}
s _{3V at 30mA from a Single Cell}
s _{5V at 200mA from 3.3V}
s _{High Output Voltage Capability: Up to 28V}
s _{Low Shutdown Current: < 1µA}
s _{Automatic Burst Mode}^TM _{Switching at Light Load}
s _{Low VCESAT Switch: 300mV at 300mA}
s _{8-Lead MSOP and SO Packages}
U
APPLICATIO S
s _Pagers
s _{Cordless Phones}
s _{Battery Backup}
s _{LCD Bias}
s _{Portable Electronic Equipment}
LT1610
1.7MHz, Single Cell
Micropower
DC/DC Converter
DESCRIPTIO
The LT^®1610 is a micropower fixed frequency DC/DC
converter that operates from an input voltage as low as 1V.
Intended for small, low power applications, it switches at
1.7MHz, allowing the use of tiny capacitors and inductors.
The device can generate 3V at 30mA from a single cell
(1V) supply. An internal compensation network can be
connected to the LT1610’s V_C pin, eliminating two exter-
nal components. No-load quiescent current of the LT1610
is 30µA, and the internal NPN power switch handles a
300mA current with a voltage drop of 300mV.
The LT1610 is available in 8-lead MSOP and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
L1
4.7µH
D1
+
1 CELL
6
V_IN
3
SHDN
5
SW
2
FB
C1
LT1610
22µF
8
7
COMP
GND
V_C
PGND
1
4
V_OUT
3V
30mA
R1
1M
R2 ⁺ _C2
681k
22µF
C1, C2: AVX TAJA226M006R
D1: MOTOROLA MBR0520
L1: MURATA LQH1C4R7
1610 F01
Figure 1. 1-Cell to 3V Step-Up Converter
Efficiency
85
V_OUT = 3V
80
V_IN = 1.25V
75
V_IN = 1.5V
70
V_IN = 1V
65
60
55
50
0.1
1
10
LOAD CURRENT (mA)
100
1610 TA01
1