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TC7662B

CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER

Microchip Technology 

CHARGE PUMP DC-TO-DC

VOLTAGE CONVERTER

TC7662B

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage ...................................................... +16.5V

LV, Boost and OSC Inputs Voltage (Note 1)

V+<5.5V ..................................... – 0.3V to (V+ + 0.3V)

>5.5V .................................. (V+ – 5.5V) to (V+ + 0.3V)

Current Into LV (Note 1)

V+ >3.5V ............................................................ 20µA

Output Short Duration

(VSUPPLY ≤ 5.5V) ....................................... Continuous

Power Dissipation (TA ≤ 70°C) (Note 2)

Plastic DIP ...................................................... 730mW

SO ..................................................................470mW

Operating Temperature Range

C Suffix .................................................. 0°C to +70°C

E Suffix ............................................. – 40°C to +85°C

Storage Temperature Range ................ – 65°C to +150°C

Lead Temperature (Soldering, 10 sec) ................. +300°C

* Static-sensitive device. Unused devices must be stored in conductive

material. Protect devices from static discharge and static fields. Stresses

above those listed under "Absolute Maximum Ratings" may cause perma-

nent damage to the device. These are stress ratings only and functional

operation of the device at these or any other conditions above those

indicated in the operation sections of the specifications is not implied.

Exposure to absolute maximum rating conditions for extended periods

may affect device reliability.

ELECTRICAL CHARACTERISTICS: V+ = 5V, TA = +25°C, OSC = Free running, Test Circuit Figure 2, Unless

Otherwise Specified.

Symbol Parameter

Test Conditions

Min Typ Max Unit

I+

I+

V+H

VL+

ROUT

fOSC

PEff

VOUTEff

ZOSC

Supply Current (Note 3)

(Boost pin OPEN OR GND)

Supply Current

(Boost pin = V+)

Supply Voltage Range, High

(Note 4)

Supply Voltage Range, Low

Output Source Resistance

Oscillator Frequency

Power Efficiency

Voltage Conversion Efficiency

Oscillator Impedance

RL = ∞, +25°C

0°C ≤ TA ≤ +70°C

– 40°C ≤ TA ≤ +85°C

– 55°C ≤TA ≤ +125°C

0°C ≤ TA ≤ +70°C

– 40°C ≤ TA ≤ +85°C

– 55°C ≤ TA ≤ +125°C

RL = 10 kΩ, LV Open, TMIN ≤ TA ≤ TMAX

RL = 10 kΩ, LV to GND, TMIN ≤ TA ≤ TMAX

IOUT = 20mA, 0°C ≤ TA ≤ +70°C

IOUT = 20mA, – 40°C ≤ TA ≤ +85°C

IOUT = 20mA, – 55°C ≤ TA ≤ +125°C

IOUT = 3mA, V+ = 2V, LV to GND ,

0°C ≤ TA ≤ +70°C

IOUT = 3mA, V+ = 2V, LV to GND ,

– 40°C ≤ TA ≤ +85°C

IOUT = 3mA, V+ = 2V, LV to GND ,

– 55°C ≤ TA ≤ +125°C

COSC = 0,Pin 1 Open or GND

Pin 1 = V+

RL = 5kΩ

TMIN ≤ TA ≤ TMAX

RL = ∞

V+ = 2V

V+ = 5V

—

80

160

µA

—

—

180

µA

—

—

180

µA

—

—

200

µA

—

—

300

µA

350

400

3.0

—

15

V

1.5

—

3.5

V

—

65

100

Ω

—

—

120

Ω

—

—

150

Ω

—

—

250

Ω

—

—

300

Ω

—

—

400

Ω

5

10

—

kHz

35

96

96

—

%

95

97

99 99.9 —

%

—

1

—

MΩ

—

100

—

kΩ

NOTES:

1. Connecting any terminal to voltages greater than V+ or less than GND may cause destructive latch-up. It is recommended that no inputs from

sources operating from external supplies be applied prior to “power up” of the TC7662B.

2. Derate linearly above 50°C by 5.5 mW/°C.

3. In the test circuit, there is no external capacitor applied to pin 7. However, when the device is plugged into a test socket, there is usually a very

small but finite stray capacitance present, of the order of 5pF.

4. The TC7662B can operate without an external diode over the full temperature and voltage range. This device will function in existing designs which

incorporate an external diode with no degradation in overall circuit performance.

TC7662B-8 9/11/96

2

© 2001 Microchip Technology Inc. DS21469A

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