Datasheet
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range, T
A
= –40 C to
85 C, T
A
= T
J
, typical values are at T
A
= 25 C, V
IN
= 7.2 V, MODE = 1 (constant frequency),
SD/SYNC = 0 V. (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Pulse Width Modulator Section
TPS62100, 300 kHz version, VIN = 5 V 225 300 375 kHz
SW switching frequency
TPS62101, 600 kHz version, VIN = 5 V 450 600 750 kHz
SW switching frequency
TPS62102, 1 MHz version, VIN = 5 V 0.75 1 1.25 MHz
TPS62103, 2 MHz version, VIN = 5 V 1.5 2 2.5 MHz
TPS62100, 300 kHz version, VIN = 5 V,
See Notes 1 and 2
490 kHz
Maximum sync frequency
TPS62101, 600 kHz version, VIN = 5 V,
See Notes 1 and 2
966 kHz
Maximum sync. frequency
TPS62102, 1 MHz version, VIN = 5 V,
See Notes 1 and 2
1.61 MHz
TPS62103, 2 MHz version, VIN = 5 V,
See Notes 1 and 2
2.5 MHz
Maximum duty cycle COMP = 2.5 V 100%
Minimum duty cycle COMP = 0 V 0%
Output Switch Section
SW NFET R
DS(on)
I
SW
= 500 mA VIN = 7.2 V 0.3 0.6 Ω
SW PFET R
DS(on)
I
SW
= –500 mA VIN = 7.2 V 0.5 1 Ω
SW NFET R
DS(on)
I
SW
= 500 mA VIN = 3.6 V 0.6 1.2 Ω
SW PFET R
DS(on)
I
SW
= –500 mA VIN = 3.6 V 0.8 1.6 Ω
SW output leakage SW = 4.5V VIN = 9 V –10 0 10 µA
SW charge switch current limit 1 Terminates pulse 0.65 0.95 1.25 A
SW charge switch current limit 2 Initiates soft-start, See Note 1 0.75 1.15 1.55 A
SW current, light-load mode Peak inductor current 112 160 208 mA
Shutdown and Synchronization Section
SD/SYNC threshold 0.5 1 2.3 V
SD/SYNC input current SD/SYNC = 0 V –100 0 100 nA
SD/SYNC input current SD/SYNC = 7.2 V –1 0 1 µA
Maximum synchronization pulse width 25 37 µs
Minimum synchronization pulse width 50 ns
Three–State Mode Control Input Section
Light-load MODE threshold 225 300 410 mV
Constant frequency MODE threshold 475 600 750 mV
Open circuit MODE voltage 375 450 510 mV
MODE input-low current Mode = 0 V –20 –12 –5 µA
MODE input-high current Mode = 1.4 V 10 22 33 µA
NOTES: 1. Ensured by design. Not production tested.
2. Minimum synchronization frequency must be less than the natural running frequency.