MAX1697UEUT+T Maxim Integrated Products, MAX1697UEUT+T Datasheet

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MAX1697UEUT+T

Manufacturer Part Number
MAX1697UEUT+T
Description
Charge Pumps 60mA Invert Charge Pump w/Shutdown
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX1697UEUT+T

Function
Inverting
Output Voltage
- 1.4 V to - 5.5 V
Output Current
60 mA
Maximum Operating Temperature
+ 85 C
Package / Case
SOT-23-6
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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.
19-1499; Rev 3; 12/08
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.
Negative Supply from +5V or +3.3V Logic Supplies
Small LCD Panels
GaAsFET Bias Supplies
Handy-Terminals, PDAs
Battery-Operated Equipment
ON
1.5V to 5.5V
INPUT
OFF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
SHDN
C1+
General Description
MAX1697U
60mA, SOT23 Inverting Charge Pump
GND
1μF
C1-
OUT
Applications
1μF
NEGATIVE
OUTPUT
-1
60mA
V
IN
♦ ♦ 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
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.
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.
PART NO.
MAX1697_EUT-T
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 ‘+’.
SUFFIX
U
R
S
T
PART
TOP VIEW
FREQUENCY
OUT
C1-
IN
(kHz)
125
250
12
35
with Shutdown
1
2
3
-40°C to +85°C
TEMP RANGE
Ordering Information
+
MAX1697
SOT23
Pin Configuration
AABW
AABV
AABX
AABY
-T
6
5
4
TOP MARK
C1+
SHDN
GND
AABW
AABV
AABX
AABY
PIN-PACKAGE
+T
Features
6 SOT23
ACCM
ACCK
ACBT
ACCL
#T
1

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MAX1697UEUT+T Summary of contents

Page 1

... MAX1697U SHDN ON OFF GND ________________________________________________________________ Maxim Integrated Products 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. ♦ ♦ 60mA Output Current ♦ ♦ Low 12Ω Output Resistance ♦ ♦ 150µA Supply Current (MAX1697R) ♦ ...

Page 2

SOT23 Inverting Charge Pump with Shutdown ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to +6V C1+, SHDN to GND .....................................-0. C1- to GND..............................................(V OUT to GND .............................................................+0.3V to -6V OUT Output Current............................................................90mA OUT Short-Circuit to GND .............................................Indefinite ...

Page 3

SOT23 Inverting Charge Pump ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1, capacitors from Table +25°C.) A PARAMETER Wake-Up Time from Shutdown I OUT THERMAL SHUTDOWN Trip Temperature Temperature increasing Hysteresis ELECTRICAL CHARACTERISTICS (Circuit of Figure ...

Page 4

SOT23 Inverting Charge Pump with Shutdown (Circuit of Figure 1, capacitors from Table 2, V MAX1697R OUTPUT VOLTAGE vs. OUTPUT CURRENT 0 -0 +2V -1.0 IN -1.5 -2 +3.3V IN -2.5 -3.0 -3.5 -4.0 V ...

Page 5

SOT23 Inverting Charge Pump (Circuit of Figure 1, capacitors from Table 2, V SUPPLY CURRENT vs. INPUT VOLTAGE 2.5 MAX1697U 2.0 1.5 MAX1697T 1.0 MAX1697S 0.5 MAX1697R 0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) ...

Page 6

SOT23 Inverting Charge Pump with Shutdown (Circuit of Figure 1, capacitors from Table 2, V START-UP FROM SHUTDOWN MAX1697 TOC19 0V MAX1697S (35kHz) V OUT 0V MAX1697R (12kHz) V OUT SHDN 400μs/div MAX1697S OUTPUT CURRENT vs. CAPACITANCE 80 V ...

Page 7

... Positive Terminal of the Flying 6 C1+ Capacitor Detailed Description The MAX1697 capacitive charge pumps invert the volt- age applied to their input. For highest performance, use low equivalent series resistance (ESR) capacitors (e.g., ceramic). During the first half-cycle, switches S2 and S4 open, switches S1 and S3 close, and capacitor C1 charges to the voltage at IN (Figure 2) ...

Page 8

SOT23 Inverting Charge Pump with Shutdown Figure 2. Ideal Voltage Inverter f OSC Figure 3a. Switched-Capacitor Model where the output impedance is roughly approximated by: 1 ≅ ...

Page 9

SOT23 Inverting Charge Pump The most common application for these devices is a charge-pump voltage inverter (Figure 1). This applica- tion requires only two external components—capacitors C1 and C2—plus a bypass capacitor, if necessary. Refer to the Capacitor Selection ...

Page 10

SOT23 Inverting Charge Pump with Shutdown … MAX1697 … SHDN V OUT Figure 4. Cascading MAX1697s to Increase Output Voltage … ...

Page 11

SOT23 Inverting Charge Pump For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 6 SOT23 ______________________________________________________________________________________ with Shutdown Package Information PACKAGE CODE U6F-6 PACKAGE OUTLINE, SOT 6L BODY DOCUMENT NO. 21-0058 1 21-0058 I ...

Page 12

SOT23 Inverting Charge Pump with Shutdown For the latest package outline information and land patterns www.maxim-ic.com/packages. 12 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, SOT 6L BODY 21-0058 ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600___________________ 13 © 2008 Maxim Integrated Products ...

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