Rainbow Electronics MAX711 - Manual

_______________General Description
The MAX710/MAX711 integrate a step-up DC-DC con-
verter with a linear regulator to provide step-up/down
voltage conversion. They are optimized for battery
applications where the input varies above and below
the regulated output voltage. They have an input range
from +1.8V to +11V. Typical efficiency when boosting
battery inputs is 85%.
The MAX710/MAX711 can be configured for minimum
noise or optimum efficiency. Shutdown control turns off
the part completely, disconnecting the input from the
output (I
SHDN = 0.2µA). Standby control turns off only
the step-up converter and leaves the low-power linear
regulator active (I
Q = 7µA).
The MAX710 has a preset 3.3V or 5V output voltage.
The MAX711 has an adjustable output that can be set
from +2.7V to +5.5V with two resistors. Both devices
come in 16-pin narrow SO packages.
________________________Applications
Single-Cell, Lithium-Powered Portable Devices
Digital Cameras
2- to 4-Cell AA Alkaline Hand-Held Equipment
3.3V and Other Low-Voltage Systems
2-, 3-, and 4-Cell Battery-Powered Equipment
Battery-Powered Devices with AC Input Adapters
____________________________Features
♦ Step-Up/Down Voltage Conversion
♦ +1.8V to +11V Input Range
♦ Output:
5V/250mA at V IN = 1.8V
5V/500mA at V IN = 3.6V
♦ No External FETs Required
♦ Load Disconnected from Input in Shutdown
♦ Battery Drain:
200µA No-Load (V IN = 4V)
7µA in Standby
0.2µA when Off
♦ Low-Noise and High-Efficiency Modes
MAX710/MAX711
3.3V/5V or Adjustable,
Step-Up/Down DC-DC Converters
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
LX LX
PGND
GND
REF
PS
LBI+
LBI-
OUT
TOP VIEW
MAX710
MAX711
SO
PGND
ILIM
3/5 (FB)
SHDN
STBY
N/E
LBO
( ) IS FOR THE MAX711.
__________________Pin Configuration
MAX710
LBI+ LBO
N/E
SHDN OFF
ON
STBY
3/5
LBI-
REF PGND
C3
0.1 µ F
GND ILIM
LX
PS
C4
C1
C2
L1
OUTPUT
3.3V/5V
+1.8V TO +11V
INPUT
OUT
5V
3.3V
ON
STBY
__________Typical Operating Circuit
19-1254; Rev 0; 7/97
PART
MAX710 C/D
MAX710ESE
MAX711 C/D 0°C to +70°C
-40°C to +85°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
Dice
16 Narrow SO
Dice
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
______________Ordering Information
MAX711ESE -40°C to +85°C 16 Narrow SO
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.