SSL152x_1

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 15 September 2008

10 of 17

NXP Semiconductors

SSL152x

SMPS ICs for low power systems

[1]

printed-circuit board. See the SSL152x application notes for details.

11. Characteristics

Table 6.

Characteristics

positive when flowing into the IC; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply

operating supply current

normal operation

-

1.3

1.9

mA

start-up supply current

start-up

-

180

400

µA

supply current

−6

−4

−3mA

start-up supply voltage

9

9.5

10

V

stop supply voltage

undervoltage lockout

7.0

7.5

8.0

V

current on pin DRAIN

no auxiliary supply

-

1.5

2

mA

with auxiliary supply

-

30

125

µA

Pulse width modulator

minimum duty factor

-

0

-

%

maximum duty cycle

f = 100 kHz

-

75

-

%

SOPS

demagnetization detection voltage

50

100

150

mV

transformer ringing suppression

time

1.0

1.5

2.0

µs

RC oscillator

minimum voltage on pin RC

60

75

90

mV

maximum voltage on pin RC

2.4

2.5

2.6

V

charging time

-

1

-

µs

oscillator frequency

10

100

200

kHz

Duty factor regulator: pin REG

voltage on pin REG

2.4

2.5

2.6

V

voltage gain

-

20

-

dB

clamp voltage on pin REG

-

-

7.5

V

Valley switching

(

valley recognition voltage change

with time

−102

-

+102

V/

µs

ringing frequency

N

200

550

800

kHz

valley recognition to switch-on

delay time

-

150

-

ns

Current and short-circuit winding protection

maximum voltage on pin SOURCE

∆V/∆t = 0.1 V/µs

0.47

0.50

0.53

V

delay time

∆V/∆t = 0.5 V/µs

-

160

185

ns

short-winding protection voltage

∆V/∆t = 0.5 V/µs

0.7

0.75

0.8

V

leading edge blanking time

250

350

450

ns