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PDF MAX1697U Data sheet ( Hoja de datos )
| Número de pieza | MAX1697U | |
| Descripción | 60mA / SOT23 Inverting Charge Pump with Shutdown | |
| Fabricantes | Maxim Integrated | |
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19-1499; Rev 0; 7/99
60mA, SOT23 Inverting Charge Pump
with Shutdown
General Description
The MAX1697 ultra-small, monolithic, CMOS charge-
pump voltage inverter accepts an input voltage ranging
from +1.25V to +5.5V. This device features an ultra-low
12Ω output resistance, permitting loads of up to 60mA
with maximum efficiency. The MAX1697 is available
with operating frequencies of 12kHz, 35kHz, 125kHz, or
250kHz, allowing optimization of supply current or
external component size. Its small external components
and micropower shutdown mode make this device
ideal for both battery-powered and board-level voltage
conversion applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. Applications include
generating a negative supply from a +5V or +3.3V logic
supply to power analog circuitry. All versions come in a
6-pin SOT23 package and deliver 60mA.
For applications with lower current requirements, the
MAX1719/MAX1720/MAX1721 are pin-compatible
SOT23 charge pumps that supply up to 25mA.
Applications
Negative Supply from +5V or +3.3V Logic Supplies
Small LCD Panels
GaAsFET Bias Supplies
Handy-Terminals, PDAs
Battery-Operated Equipment
Features
♦ 60mA Output Current
♦ Low 12Ω Output Resistance
♦ 150µA Supply Current (MAX1697R)
♦ Requires Only Two 1µF Capacitors (MAX1697U)
♦ Start-Up Current Limited
♦ +1.25V to +5.5V Input Voltage Range
♦ 0.1µA Logic-Controlled Shutdown
♦ Slew-Rate Limited to Reduce EMI
♦ 6-Pin SOT23 Package
Ordering Information
PART
MAX1697_EUT-T
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
Note: The MAX1697 is available with four different operating
frequencies. Choose the desired frequency from the table
below and insert the suffix in the blank above to complete the
part number.
PART NO.
SUFFIX
R
S
T
U
FREQUENCY
(kHz)
12
35
125
250
TOP
MARK
AABV
AABW
AABX
AABY
Typical Operating Circuit
1µF
INPUT
1.5V to 5.5V
C1+
IN
C1-
OUT
MAX1697U
ON SHDN
OFF
GND
NEGATIVE
OUTPUT
-1 · VIN
60mA
1µF
Pin Configuration
TOP VIEW
OUT 1
6 C1+
MAX1697
IN 2
5 SHDN
C1- 3
4 GND
SOT23-6
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
60mA, SOT23 Inverting Charge Pump
with Shutdown
Typical Operating Characteristics (continued)
(Circuit of Figure 1, capacitors from Table 2, VIN = +5V, SHDN = IN, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. INPUT VOLTAGE
2.5
MAX1697R/S/T/U
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
35
MAX1697R
OUTPUT RESISTANCE
vs. TEMPERATURE
35
2.0
MAX1697U
30
25
1.5 20
MAX1697T
1.0 15
MAX1697S
10
0.5 MAX1697R
5
VIN = +5V
VIN = +3.3V
VIN = +2V
30
25
20
15
10
5
VIN = +1.5V
VIN = +2V
VIN = +3.3V
VIN = +5V
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MAX1697S
OUTPUT RESISTANCE
vs. TEMPERATURE
30
VIN = +1.5V
25
20 VIN = +2V
15 VIN = +3.3V
10 VIN = +5V
5
0
-40
1000
-20 0 20 40 60
TEMPERATURE (°C)
PUMP FREQUENCY
vs. TEMPERATURE
80
0
-40
35
-20 0 20 40
TEMPERATURE (°C)
60
MAX1697T
OUTPUT RESISTANCE
vs. TEMPERATURE
80
30 VIN = +1.5V
25
VIN = +2V
20
15 VIN = +3.3V
10 VIN = +5V
5
0
-40
-20 0 20 40 60 80
TEMPERATURE (°C)
MAX1697R/S
OUTPUT NOISE AND RIPPLE
MAX1697 TOC17
0
-40
45
40
35
30
25
20
15
10
5
0
-40
-20 0 20 40 60
TEMPERATURE (°C)
MAX1697U
OUTPUT RESISTANCE
vs. TEMPERATURE
80
VIN = +1.5V
VIN = +2V
VIN = +3.3V
VIN = +5V
-20 0 20 40 60 80
TEMPERATURE (°C)
MAX1697T/U
OUTPUT NOISE AND RIPPLE
MAX1697 TOC18
MAX1697U
100 MAX1697T
MAX1697S
MAX1697R
10
VIN = +1.5V TO +5V
1
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
20µs/div
VIN = 3.3V, IOUT = 5mA,
10mV/div, AC-COUPLED
VOUT
MAX1697R
(12kHz)
VOUT
MAX1697S
(35kHz)
2µs/div
VIN = 3.3V, IOUT = 5mA,
10mV/div, AC-COUPLED
VOUT
MAX1697T
(125kHz)
VOUT
MAX1697U
(250kHz)
_______________________________________________________________________________________ 5
5 Page 
60mA, SOT23 Inverting Charge Pump
with Shutdown
________________________________________________________Package Information
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX1697U.PDF ] | |
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