TC7662B datasheet(2/11 Pages) MICROCHIP

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TC7662B

CHARGE PUMP DC-TO-DC

VOLTAGE CONVERTER

TC7662B-8 9/11/96

DS21469A

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+

Supply Current (Note 3)

RL = ∞, +25°C

—

160

µA

(Boost pin OPEN OR GND)

°C ≤ TA ≤ +70°C

—

180

µA

– 40

°C ≤ TA ≤ +85°C

—

180

µA

– 55

°C ≤TA ≤ +125°C

—

200

µA

I+

Supply Current

°C ≤ TA ≤ +70°C

—

300

µA

(Boost pin = V+)

– 40

°C ≤ TA ≤ +85°C

350

– 55

°C ≤ TA ≤ +125°C

400

V+

Supply Voltage Range, High

RL = 10 kΩ, LV Open, TMIN ≤ TA ≤ TMAX

3.0

—

(Note 4)

Supply Voltage Range, Low

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

1.5

—

3.5

ROUT

Output Source Resistance

IOUT = 20mA, 0°C ≤ TA ≤ +70°C

—

100

Ω

IOUT = 20mA, – 40°C ≤ TA ≤ +85°C

—

120

Ω

IOUT = 20mA, – 55°C ≤ TA ≤ +125°C

—

150

Ω

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

—

250

Ω

°C ≤ TA ≤ +70°C

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

—

300

Ω

– 40

°C ≤ TA ≤ +85°C

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

—

400

Ω

– 55

°C ≤ TA ≤ +125°C

fOSC

Oscillator Frequency

COSC = 0,Pin 1 Open or GND

—

kHz

Pin 1 = V+

PEff

Power Efficiency

RL = 5kΩ

—

TMIN ≤ TA ≤ TMAX

VOUTEff

Voltage Conversion Efficiency

RL = ∞

99.9

—

ZOSC

Oscillator Impedance

V+ = 2V

—

Ω

V+ = 5V

—

100

—

Ω

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.

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 ............................................................ 20

µA

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.

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