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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1697 Datasheet

60mA / SOT23 Inverting Charge Pump with Shutdown

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MAX1697 pdf
19-1499; Rev 3; 12/08
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
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
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
Slew-Rate Limited to Reduce EMI
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1697_EUT-T -40°C to +85°C
6 SOT23
Note 1: The MAX1697 requires special solder temperature pro-
file described in the Absolute Maximum Ratings section.
Note 2: 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. FREQUENCY
SUFFIX
(kHz)
TOP MARK
-T +T #T
R 12 AABV AABV ACBT
S 35 AABW AABW ACCK
T 125 AABX AABX ACCL
U 250 AABY AABY ACCM
Note 3: MAX1697 is available in different package material.
Add the following suffix to the part number when ordering:
-T = Denotes a package containing lead(Pb).
+T = Denotes a lead(Pb)-free/RoHS-compliant package.
#T = Denotes an RoHS-compliant device that may include
lead(Pb) that is exempt under the RoHS requirements.
Pin Configuration
TOP VIEW
+
OUT 1
6 C1+
MAX1697
IN 2
5 SHDN
C1- 3
4 GND
SOT23
Note 4: Leaded and lead-free top marks are identical. Per
Maxim guideline, the pin 1 indicator for leaded package is
a ‘•’ and the lead-free package is a ‘+’.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1697 Datasheet

60mA / SOT23 Inverting Charge Pump with Shutdown

No Preview Available !

MAX1697 pdf
60mA, SOT23 Inverting Charge Pump
with Shutdown
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +6V
C1+, SHDN to GND .....................................-0.3V to (VIN + 0.3V)
C1- to GND..............................................(VOUT - 0.3V) to + 0.3V
OUT to GND .............................................................+0.3V to -6V
OUT Output Current............................................................90mA
OUT Short-Circuit to GND .............................................Indefinite
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 14mW/°C above +70°C) (Note 5)...1.1W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature ..........................................................(Note 6)
Note 5:
Note 6:
Thermal properties are specified with product mounted on the PC board with one square-inch of copper area and still air.
This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the
device can be exposed to during board level solder attach and rework. Maxim recommends the use of the solder profiles
recommended in the industry standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection
reflow processes. Preheating, per this standard, is required. Hand or wave soldering is not recommended.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, capacitors from Table 2, VIN = +5V, SHDN = IN, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Supply Voltage Range
MAX1697R/S, RL = 5kΩ
MAX1697T/U, RL = 5kΩ
TA = +25°C
TA = 0°C to +85°C
TA = +25°C
TA = 0°C to +85°C
MAX1697R
1.25
1.5
1.4
1.5
150
5.5
5.5
5.5
5.5
300
V
Quiescent Supply Current
(Note 9)
TA = +25°C
MAX1697S
MAX1697T
350 650
950 1700
µA
MAX1697U
1800 3400
Shutdown Supply Current
Short-Circuit Current
SHDN = GND
TA = +25°C
TA = +85°C
Output shorted to ground, TA = +25°C
MAX1697R
0.002
1
0.03
170
7 12 17
µA
mA
Oscillator Frequency
TA = +25°C
MAX1697S
MAX1697T
20 35 50
kHz
70 125 180
MAX1697U
140 250 360
Voltage Conversion Efficiency
Output Resistance (Note 7)
OUT to GND Shutdown
Resistance
IOUT = 0, TA = +25°C
IOUT = 60mA
TA = +25°C
TA = 0°C to +85°C
SHDN = GND, OUT is internally pulled to GND
in shutdown
99 99.9
12 25
33
38
%
Ω
Ω
SHDN Input Logic High
SHDN Input Logic Low
SHDN Bias Current
2.5V VIN 5.5V
VIN(MIN) VIN 2.5V
2.5V VIN 5.5V
VIN(MIN) VIN 2.5V
SHDN = GND or IN
TA = +25°C
TA = +85°C
2.0
VIN - 0.2
-100
0.05
10
0.6
0.2
+100
V
V
nA
2 _______________________________________________________________________________________


Part Number MAX1697
Description 60mA / SOT23 Inverting Charge Pump with Shutdown
Maker Maxim
Total Page 13 Pages
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