TelCom Semiconductor Inc TC7660HEPA, TC7660HEOA, TC7660HCPA, TC7660HCOA Datasheet

HIGH FREQUENCY 7660 DC-TO-DC VOLT AGE CONVERTER

EVALUATION

KIT

AVAILABLE

FEATURES

■ Pin Compatible with 7660, High Frequency

Performance DC-to-DC Converter

■ Low Cost, Two Low Value External Capacitors

Required ........................................................ (1.0µF)

■ Converts +5V Logic Supply to ±5V System

■ Wide Input Voltage Range ....................1.5V to 10V

■ Voltage Conversion........................................ 99.7%

■ Power Efficiency................................................ 85%

■ Available in 8-Pin SOIC and 8-Pin PDIP Packages

FUNCTIONAL BLOCK DIAGRAM

+

V+CAP

82

OSC

7

RC

OSCILLATOR

6

LV

INTERNAL
VOLTAGE

REGULATOR

TC7660H

÷ 2

VOLTAGE–

LEVEL

TRANSLATOR

3

GND

LOGIC

NETWORK

4

CAP

5

V

OUT

GENERAL DESCRIPTION

The TC7660H is a pin-compatible, high frequency up­grade to the Industry standard TC7660 charge pump volt­age converter. It converts a +1.5V to +10V input to a
corresponding – 1.5V to -10V output using only two low-cost
capacitors, eliminating inductors and their associated cost,
size and EMI.

The TC7660H operates at a frequency of 120kHz (ver­sus 10kHz for the TC7660), allowing the use of 1.0µF
external capacitors. Oscillator frequency can be reduced
(for lower supply current applications) by connecting an
external capacitor from OSC to ground.

The TC7660H is available in 8-pin DIP and small outline
(SOIC) packages in commercial and extended temperature
ranges.

ORDERING INFORMATION

–

Part No. Package Range

TC7660HCOA 8-Pin SOIC 0°C to +70°C
TC7660HCPA 8-Pin Plastic DIP 0°C to +70°C
TC7660HEOA 8-Pin SOIC – 40°C to +85°C
TC7660HEPA 8-Pin Plastic DIP – 40°C to +85°C

TC7660EV Evaluation Kit for

Charge Pump Family

1

TC7660H

2

3

4

Temperature

5

PIN CONFIGURATION (DIP and SOIC)

NC

1

+

CAP

2
3
4

1
2
3
4

TC7660HCPA
TC7660HEPA

TC7660HCOA
TC7660HEOA

TELCOM SEMICONDUCTOR, INC.

GND

–

CAP

NC

+

CAP

GND

–

CAP

NC = NO INTERNAL CONNECTION

+

8

V

OSC

7

LOW

6

VOLTAGE (LV)

V

5

OUT

+

V

8

OSC

7

LOW

6

VOLTAGE (LV)

5

V

OUT

6

7

8

TC7660H-2 10/1/96

4-63

TC7660H

HIGH FREQUENCY 7660 DC-TO-DC

VOLTAGE CONVERTER

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage ...................................................... +10.5V

LV and OSC Inputs

Voltage (Note 1) ........................ – 0.3V to (V+ + 0.3V)

for V+ < 5.5V

(V+ – 5.5V) to (V+ + 0.3V)

for V+ > 5.5V

Current Into LV (Note 1)......................20µA for V+ > 3.5V

Output Short Duration (V

≤ 5.5V) .........Continuous

SUPPLY

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

SOIC...............................................................470mW

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

ELECTRICAL CHARACTERISTICS: Over Operating Temperature Range with V

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 perma­nent 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.

+

= 5V, CI = C2 = 1µF,C

OSC

= 0,

Test Circuit (Figure 1), unless otherwise indicated.

Symbol Parameter Test Conditions Min Typ Max Unit

+

I

+

V

H

+

V

L

R

OUT

F

OSC

P

EFF

V

EFF

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

Supply Current RL = ∞ — 0.46 1.0 mA
Supply Voltage Range, High Min ≤ TA ≤ Max, 3 — 10 V

RL = 5kΩ, LV Open

Supply Voltage Range, Low Min ≤ TA ≤ Max, 1.5 — 3.5 V

RL = 5kΩ, LV to GND

Output Source Resistance I

= 20mA, TA = 25°C — 55 80 Ω

OUT

I

= 20mA, 0°C ≤ TA ≤ +70°C——95Ω

OUT

(C Device)
I

= 20mA, – 40°C ≤ TA ≤ +85°C — — 110 Ω

OUT

(E Device)

+

V

= 2V, I

= 3mA, LV to GND — 150 250 Ω

OUT

0°C ≤ TA ≤ +70°C
Oscillator Frequency — 120 — kHz
Power Efficiency I

= 10mA, Min ≤ TA ≤ Max 81 85 — %

OUT

Voltage Efficiency RL = ∞ 99 99.7 — %

inputs from sources operating from external supplies be applied prior to "power up" of the TC7660H.

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

4-64

TELCOM SEMICONDUCTOR, INC.