SC1159 Datasheet, PDF (5/20 Pages) Semtech Corporation – Programmable Synchronous DC/DC Hysteretic Controller with VRM 8.5 VID Range

SC1159
POWER MANAGEMENT
DC Electrical Characteristics (Cont.)
Parameter
High-Side Output Driver
Peak Output Current
Equivalent Output
Resistance
Low-Side Output Driver
Peak Output Current
Equivalent Output
Resistance
Symbol
Conditions
Isrc_HIGHDR duty cycle < 2%, tpw < 100us,
T_J = 125°C
Isink_HIGHDR
V_BOOT - V_BOOTLO = 6.5V, V_HIGHDR = 1.5V (src),
or V_HIGHDR = 5V (sink)
Rsrc_HIGHDR
T_J = 125°C
V_BOOT - V_BOOTLO = 6.5V, V_HIGHDR = 6V
Rsink_HIGHDR T_J = 125°C
V_BOOT - V_BOOTLO = 6.5V, V_HIGHDR = 0.5V
Isrc_LOWDR
Isink_LOWDR
Rsrc_LOWDR
Rsink_LOWDR
duty cycle < 2%, tpw < 100us,
T_J = 125°C
V_DRV = 6.5V, V_LOWDR = 1.5V (src), or
V_LOWDR = 5V (sink)
T_J = 125°C
V_DRV = 6.5V, V_LOWDR = 6V
T_J = 125°C
V_DRV = 6.5V, V_LOWDR = 0.5V
AC Electrical Characteristics (Note 1)
Parameter
Hysteretic Comparators
Propagation Delay Time
from VSENSE to HIGHDR or
LOWDR (excluding
deadtime)
Output Drivers
HIGHDR rise/fall time
LOWDR rise/falltime
Overcurrent Protection
Comparator Propagation
Delay Time
Deglitch Time (Includes
comparator propagation
delay time)
Symbol
Conditions
t_HCPROP
10mV overdrive,
1.3V ≤ Vref ≤ 1.8V
tr_HIGHDR
tr_HIGHDR
tr_LOWDR
tf_LOWDR
CI = 9nF, V_BOOT = 6.5v, V_BOOTLO = grounded,
T_J =125°C
CI = 9nF, V_DRV = 6.5V,
T_J =125°C
t_OVPROP
t_OVDGL
Min Typ Max Units
2
A
45
Ω
5
2
A
45
Ω
5
Min Typ Max Units
150 250 ns
60 ns
60 ns
1
µs
2
5
µs
 2002 Semtech Corp.
5
www.semtech.com